1
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Zhang Q, Yang L, Bai R, Peng B, Liu Y, Duan C, Zhang C. Phase division and recognition of crystal HRTEM images based on machine learning and deep learning. Micron 2024; 184:103665. [PMID: 38850965 DOI: 10.1016/j.micron.2024.103665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 05/23/2024] [Accepted: 05/23/2024] [Indexed: 06/10/2024]
Abstract
The High Resolution Transmission Electron Microscope (HRTEM) images provide valuable insights into the atomic microstructure, dislocation patterns, defects, and phase characteristics of materials. However, the current analysis and research of HRTEM images of crystal materials heavily rely on manual expertise, which is labor-intensive and susceptible to subjective errors. This study proposes a combined machine learning and deep learning approach to automatically partition the same phase regions in crystal HRTEM images. The entire image is traversed by a sliding window to compute the amplitude spectrum of the Fast Fourier Transform (FFT) in each window. The generated data is transformed into a 4-dimensional (4D) format. Principal component analysis (PCA) on this 4D data estimates the number of feature regions. Non-negative matrix factorization (NMF) then decomposes the data into a coefficient matrix representing feature region distribution, and a feature matrix corresponding to the FFT magnitude spectra. Phase recognition based on deep learning enables identifying the phase of each feature region, thereby achieving automatic segmentation and recognition of phase regions in HRTEM images of crystals. Experiments on zirconium and oxide nanoparticle HRTEM images demonstrate the proposed method achieve the consistency of manual analysis. Code and supplementary material are available at https://github.com/rememberBr/HRTEM2.
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Affiliation(s)
- Quan Zhang
- School of Computer Science and Software Engineering, Southwest Petroleum University, Chengdu 610500, China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Chengdu 610500, China
| | - Liang Yang
- School of Computer Science and Software Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Ru Bai
- School of Computer Science and Software Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Bo Peng
- School of Computer Science and Software Engineering, Southwest Petroleum University, Chengdu 610500, China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Chengdu 610500, China
| | - Yangyi Liu
- Intelligent Policing Key Laboratory of Sichuan Province, Luzhou 646000, China; Department of Traffic Management, Sichuan Police college, Luzhou 646000, China.
| | - Chang Duan
- School of Electrical Engineering and information, Southwest Petroleum University, Chengdu 610500, China
| | - Chao Zhang
- Intelligent Policing Key Laboratory of Sichuan Province, Luzhou 646000, China; Department of Traffic Management, Sichuan Police college, Luzhou 646000, China
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2
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Fu H, Liu H, Wang X, Zhang W, Zhang H, Luo Y, Deng X, King G, Chen N, Wang L, Wu YA. Reverse Hydrogen Spillover on Metal Oxides for Water-Promoted Catalytic Oxidation Reactions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2407534. [PMID: 38973643 DOI: 10.1002/adma.202407534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 06/25/2024] [Indexed: 07/09/2024]
Abstract
Understanding the water-involved mechanism on metal oxide surface and the dynamic interaction of water with active sites is crucial in solving water poisoning in catalytic reactions. Herein, this work solves this problem by designing the water-promoted function of metal oxides in the ethanol oxidation reaction. In situ multimodal spectroscopies unveil that the competitive adsorption of water-dissociated *OH species with O2 at Sn active sites results in water poisoning and the sluggish proton transfer in CoO-SnO2 imparts water-resistant effect. Carbon material as electron donor and proton transport channel optimizes the Co active sites and expedites the reverse hydrogen spillover from CoO to SnO2. The water-promoted function arises from spillover protons facilitating O2 activation on the SnO2 surface, leading to crucial *OOH intermediate formation for catalyzing C-H and C-C cleavage. Consequently, the tailored CoO-C-SnO2 showcases a remarkable 60-fold enhancement in ethanol oxidation reaction compared to bare SnO2 under high-humidity conditions.
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Affiliation(s)
- Hao Fu
- School of Chemistry and Chemical Engineering, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning, 530004, P. R. China
| | - Hongjie Liu
- School of Chemistry and Chemical Engineering, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning, 530004, P. R. China
| | - Xiyang Wang
- Department of Mechanical and Mechatronics Engineering, Waterloo Institute for Nanotechnology, Materials Interface Foundry, University of Waterloo, Waterloo, N2L 3G1, Canada
| | - Wenhua Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Hui Zhang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, P. R. China
| | - Yunhong Luo
- School of Physical Science and Technology, Shanghai Tech University, Shanghai, 201210, P. R. China
| | - Xianwang Deng
- School of Chemistry and Chemical Engineering, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning, 530004, P. R. China
| | - Graham King
- Canadian Light Source, Saskatoon, S7N 2V3, Canada
| | - Ning Chen
- Canadian Light Source, Saskatoon, S7N 2V3, Canada
| | - Liwei Wang
- School of Chemistry and Chemical Engineering, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning, 530004, P. R. China
| | - Yimin A Wu
- Department of Mechanical and Mechatronics Engineering, Waterloo Institute for Nanotechnology, Materials Interface Foundry, University of Waterloo, Waterloo, N2L 3G1, Canada
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3
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Hao Z, Liu G, Wang P, Zhang W, Sun W, Zheng L, Guo S, Zhan S. In situ visualizing reveals potential drive of lattice expansion on defective support toward efficient removal of nitrogen oxides. Proc Natl Acad Sci U S A 2024; 121:e2311180121. [PMID: 38830101 PMCID: PMC11181023 DOI: 10.1073/pnas.2311180121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 04/04/2024] [Indexed: 06/05/2024] Open
Abstract
As a sustainable and promising approach of removing of nitrogen oxides (NOx), catalytic reduction of NOx with H2 is highly desirable with a precise understanding to the structure-activity relationship of supported catalysts. In particular, the dynamic evolution of support at microscopic scale may play a critical role in heterogeneous catalysis, however, identifying the in situ structural change of support under working condition with atomic precision and revealing its role in catalysis is still a grand challenge. Herein, we visually capture the surface lattice expansion of WO3-x support in Pt-WO3-x catalyst induced by NO in the exemplified reduction of NO with H2 using in situ transmission electron microscopy and first reveal its important role in enhancing catalysis. We find that NO can adsorb on the oxygen vacancy sites of WO3-x and favorably induce the reversible stretching of W-O-W bonds during the reaction, which can reduce the adsorption energy of NO on Pt4 centers and the energy barrier of the rate-determining step. The comprehensive studies reveal that lattice expansion of WO3-x support can tune the catalytic performance of Pt-WO3-x catalyst, leading to 20% catalytic activity enhancement for the exemplified reduction of NO with H2. This work reveals that the lattice expansion of defective support can tune and optimize the catalytic performance at the atomic scale.
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Affiliation(s)
- Zhifei Hao
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin300350, People’s Republic of China
| | - Guoquan Liu
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin300350, People’s Republic of China
| | - Pengfei Wang
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin300350, People’s Republic of China
| | - Weiyu Zhang
- School of Materials Science and Engineering, Peking University, Beijing100871, People’s Republic of China
| | - Wenming Sun
- Department of Chemistry, Beijing Key Laboratory for Optical Materials and Photonic Devices, Capital Normal University, Beijing100048, People’s Republic of China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, People’s Republic of China
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing100871, People’s Republic of China
| | - Sihui Zhan
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin300350, People’s Republic of China
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4
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Yue S, Praveen CS, Klyushin A, Fedorov A, Hashimoto M, Li Q, Jones T, Liu P, Yu W, Willinger MG, Huang X. Redox dynamics and surface structures of an active palladium catalyst during methane oxidation. Nat Commun 2024; 15:4678. [PMID: 38824167 PMCID: PMC11144237 DOI: 10.1038/s41467-024-49134-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 05/21/2024] [Indexed: 06/03/2024] Open
Abstract
Catalysts based on palladium are among the most effective in the complete oxidation of methane. Despite extensive studies and notable advances, the nature of their catalytically active species and conceivable structural dynamics remains only partially understood. Here, we combine operando transmission electron microscopy (TEM) with near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and density functional theory (DFT) calculations to investigate the active state and catalytic function of Pd nanoparticles (NPs) under methane oxidation conditions. We show that the particle size, phase composition and dynamics respond appreciably to changes in the gas-phase chemical potential. In combination with mass spectrometry (MS) conducted simultaneously with in situ observations, we uncover that the catalytically active state exhibits phase coexistence and oscillatory phase transitions between Pd and PdO. Aided by DFT calculations, we provide a rationale for the observed redox dynamics and demonstrate that the emergence of catalytic activity is related to the dynamic interplay between coexisting phases, with the resulting strained PdO having more favorable energetics for methane oxidation.
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Affiliation(s)
- Shengnan Yue
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - C S Praveen
- International School of Photonics, Cochin University of Science and Technology, Cochin, Kerala, India
| | | | - Alexey Fedorov
- Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | | | - Qian Li
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Travis Jones
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA.
| | - Panpan Liu
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Wenqian Yu
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Marc-Georg Willinger
- Scientific Center for Optical and Electron Microscopy, ETH Zurich, Zurich, Switzerland
- Department of Chemistry, Technical University of Munich, Garching, Germany
| | - Xing Huang
- College of Chemistry, Fuzhou University, Fuzhou, China.
- Qingyuan Innovation Laboratory, Quanzhou, China.
- Scientific Center for Optical and Electron Microscopy, ETH Zurich, Zurich, Switzerland.
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5
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Zhan Z, Liu Y, Wang W, Du G, Cai S, Wang P. Atomic-level imaging of beam-sensitive COFs and MOFs by low-dose electron microscopy. NANOSCALE HORIZONS 2024; 9:900-933. [PMID: 38512352 DOI: 10.1039/d3nh00494e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Electron microscopy, an important technique that allows for the precise determination of structural information with high spatiotemporal resolution, has become indispensable in unravelling the complex relationships between material structure and properties ranging from mesoscale morphology to atomic arrangement. However, beam-sensitive materials, particularly those comprising organic components such as metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), would suffer catastrophic damage from the high energy electrons, hindering the determination of atomic structures. A low-dose approach has arisen as a possible solution to this problem based on the integration of advancements in several aspects: electron optical system, detector, image processing, and specimen preservation. This article summarizes the transmission electron microscopy characterization of MOFs and COFs, including local structures, host-guest interactions, and interfaces at the atomic level. Revolutions in advanced direct electron detectors, algorithms in image acquisition and processing, and emerging methodology for high quality low-dose imaging are also reviewed. Finally, perspectives on the future development of electron microscopy methodology with the support of computer science are presented.
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Affiliation(s)
- Zhen Zhan
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong SAR, China.
| | - Yuxin Liu
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong SAR, China.
| | - Weizhen Wang
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong SAR, China.
| | - Guangyu Du
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong SAR, China.
| | - Songhua Cai
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong SAR, China.
| | - Peng Wang
- Department of Physics, University of Warwick, CV4 7AL, Coventry, UK.
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6
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Li XY, Ou P, Duan X, Ying L, Meng J, Zhu B, Gao Y. Dynamic Active Sites In Situ Formed in Metal Nanoparticle Reshaping under Reaction Conditions. JACS AU 2024; 4:1892-1900. [PMID: 38818067 PMCID: PMC11134379 DOI: 10.1021/jacsau.4c00088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 06/01/2024]
Abstract
Understanding the nonequilibrium transformation of nanocatalysts under reaction conditions is important because metastable atomic structures may be created during the process, which offers unique activities in reactions. Although reshaping of metal nanoparticles (NPs) under reaction conditions has been widely recognized, the dynamic reshaping process has been less studied at the atomic scale. Here, we develop an atomistic kinetic Monte Carlo model to simulate the complete reshaping process of Pt nanoparticles in a CO environment and reveal the in situ formation of atomic clusters on the NP surface, a new type of active site beyond conventional understanding, boosting the reactivities in the CO oxidation reaction. Interestingly, highly active peninsula and inactive island clusters both form on the (111) facets and interchange in varying states of dynamic equilibrium, which influences the catalytic activities significantly. This study provides new fundamental knowledge of nanocatalysis and new guidance for the rational design of nanocatalysts.
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Affiliation(s)
- Xiao-Yan Li
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Pengfei Ou
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Xinyi Duan
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Lei Ying
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Jun Meng
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Beien Zhu
- Photon
Science Research Center for Carbon Dioxide, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Yi Gao
- Photon
Science Research Center for Carbon Dioxide, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- Key
Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy
of Sciences, Shanghai 201210, China
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7
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Yuan W, Chen B, Han ZK, You R, Jiang Y, Qi R, Li G, Wu H, Ganduglia-Pirovano MV, Wang Y. Direct in-situ insights into the asymmetric surface reconstruction of rutile TiO 2 (110). Nat Commun 2024; 15:1616. [PMID: 38388567 PMCID: PMC10883989 DOI: 10.1038/s41467-024-46011-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 02/09/2024] [Indexed: 02/24/2024] Open
Abstract
The reconstruction of rutile TiO2 (110) holds significant importance as it profoundly influences the surface chemistry and catalytic properties of this widely used material in various applications, from photocatalysis to solar energy conversion. Here, we directly observe the asymmetric surface reconstruction of rutile TiO2 (110)-(1×2) with atomic-resolution using in situ spherical aberration-corrected scanning transmission electron microscopy. Density functional theory calculations were employed to complement the experimental observations. Our findings highlight the pivotal role played by repulsive electrostatic interaction among the small polarons -formed by excess electrons following the removal of neutral oxygen atoms- and the subsequent surface relaxations induced by these polarons. The emergence and disappearance of these asymmetric structures can be controlled by adjusting the oxygen partial pressure. This research provides a deeper understanding, prediction, and manipulation of the surface reconstructions of rutile TiO2 (110), holding implications for a diverse range of applications and technological advancements involving rutile-based materials.
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Affiliation(s)
- Wentao Yuan
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, 030000, Taiyuan, China
| | - Bingwei Chen
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
| | - Zhong-Kang Han
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China.
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany.
| | - Ruiyang You
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
| | - Ying Jiang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
| | - Rui Qi
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
| | - Guanxing Li
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
| | - Hanglong Wu
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
| | | | - Yong Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China.
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8
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Jiang L, Li K, Porter WN, Wang H, Li G, Chen JG. Role of H 2O in Catalytic Conversion of C 1 Molecules. J Am Chem Soc 2024; 146:2857-2875. [PMID: 38266172 DOI: 10.1021/jacs.3c13374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
Due to their role in controlling global climate change, the selective conversion of C1 molecules such as CH4, CO, and CO2 has attracted widespread attention. Typically, H2O competes with the reactant molecules to adsorb on the active sites and therefore inhibits the reaction or causes catalyst deactivation. However, H2O can also participate in the catalytic conversion of C1 molecules as a reactant or a promoter. Herein, we provide a perspective on recent progress in the mechanistic studies of H2O-mediated conversion of C1 molecules. We aim to provide an in-depth and systematic understanding of H2O as a promoter, a proton-transfer agent, an oxidant, a direct source of hydrogen or oxygen, and its influence on the catalytic activity, selectivity, and stability. We also summarize strategies for modifying catalysts or catalytic microenvironments by chemical or physical means to optimize the positive effects and minimize the negative effects of H2O on the reactions of C1 molecules. Finally, we discuss challenges and opportunities in catalyst design, characterization techniques, and theoretical modeling of the H2O-mediated catalytic conversion of C1 molecules.
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Affiliation(s)
- Lei Jiang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
| | - Kongzhai Li
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
- Southwest United Graduate School, Kunming 650000, Yunnan, China
| | - William N Porter
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Hua Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
| | - Gengnan Li
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jingguang G Chen
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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9
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Wang B, Liu W, Zhang M. Application of carbon-based adsorbents in the remediation of micro- and nanoplastics. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 349:119522. [PMID: 37939465 DOI: 10.1016/j.jenvman.2023.119522] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/19/2023] [Accepted: 11/01/2023] [Indexed: 11/10/2023]
Abstract
Micro-nano plastics (MNPs) are emerging contaminants that can easily enter the food chain, posing risks to both the aquatic ecosystem and human health. Various physical, biological, and chemical methods have been explored to remove MNPs from water, and recently, adsorption technology has gained attention as an effective approach. Among the potential candidates, carbon-based adsorbent has emerged as a promising choice due to their low cost, eco-friendly nature, and sustainability. This paper summarizes recent advancements in MNP removal using carbon-based adsorbents, with a focus on the modification methods and adsorption mechanisms. Additionally, the factors influencing the adsorption performance and the methods for characterizing the adsorption mechanism are analyzed. Finally, the advantages and disadvantages of carbon-based adsorbents over other adsorbents are discussed, along with the current state of sustainable recycling and future research prospects.
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Affiliation(s)
- Bin Wang
- College of Materials Science and Art Design, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Wenjing Liu
- College of Materials Science and Art Design, Inner Mongolia Agricultural University, Hohhot, 010018, China.
| | - Minghui Zhang
- College of Materials Science and Art Design, Inner Mongolia Agricultural University, Hohhot, 010018, China.
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10
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Lee J, Lee J, Lee G, Kim DS, Ryu YS, Seo M. Advancements of Intense Terahertz Field Focusing on Metallic Nanoarchitectures for Monitoring Hidden Interatomic Gas-Matter Interactions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2308975. [PMID: 37994274 DOI: 10.1002/adma.202308975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 11/07/2023] [Indexed: 11/24/2023]
Abstract
With the advancements of nanotechnology, innovative photonic designs coupled with functional materials provide a unique way to acquire, share, and respond effectively to information. It is found that the simple deposition of a 30 nm-thick palladium nanofilm on a terahertz (THz) metasurface chip with a 14 nm-wide effective nanogap of asymmetric materials and geometries allows the tracking of both interatomic and interfacial gas-matter interactions, including gas adsorption, hydrogenation (or dehydrogenation), metal phase changes, and unique water-forming reactions. Combinatorial analyses by simulation and experimental measurements demonstrate the distinct nanostructures, which leads to significant light-matter interactions and corresponding THz absorption in a real-time, highly repeatable, and reliable manner. The complex lattice dynamics and intrinsic properties of metals influenced by hydrogen gas exposure are also thoroughly examined using systematically controlled ternary gas mixture devices that mimic normal temperature and pressure. Furthermore, the novel degrees of freedom are utilized to analyze various physical phenomena, and thus, analytical methods that enable the tracking of unknown hidden stages of water-forming reactions resulting in water growth are introduced. A single exposure of the wave spectrum emphasizes the robustness of the proposed THz nanoscopic probe, bridging the gap between fundamental laboratory research and industry.
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Affiliation(s)
- Jinwoo Lee
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Jongsu Lee
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
- Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, IL, 60208, USA
| | - Geon Lee
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics, Long-wavelength Nanotechnology Laboratory, and Quantum Photonics Institute, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Dai-Sik Kim
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics, Long-wavelength Nanotechnology Laboratory, and Quantum Photonics Institute, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Yong-Sang Ryu
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Republic of Korea
| | - Minah Seo
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
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11
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Tang M, de Jongh PE, de Jong KP. In Situ Transmission Electron Microscopy to Study the Location and Distribution Effect of Pt on the Reduction of Co 3 O 4 -SiO 2. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304683. [PMID: 37649200 DOI: 10.1002/smll.202304683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 08/10/2023] [Indexed: 09/01/2023]
Abstract
The addition of Pt generally promotes the reduction of Co3 O4 in supported catalysts, which further improves their activity and selectivity. However, due to the limited spatial resolution, how Pt and its location and distribution affect the reduction of Co3 O4 remains unclear. Using ex situ and in situ ambient pressure scanning transmission electron microscopy, combined with temperature-programmed reduction, the reduction of silica-supported Co3 O4 without Pt and with different location and distribution of Pt is studied. Shrinkage of Co3 O4 nanoparticles is directly observed during their reduction, and Pt greatly lowers the reduction temperature. For the first time, the initial reduction of Co3 O4 with and without Pt is studied at the nanoscale. The initial reduction of Co3 O4 changes from surface to interface between Co3 O4 and SiO2 . Small Pt nanoparticles located at the interface between Co3 O4 and SiO2 promote the reduction of Co3 O4 by the detachment of Co3 O4 /CoO from SiO2 . After reduction, the Pt and part of the Co form an alloy with Pt well dispersed. This study for the first time unravels the effects of Pt location and distribution on the reduction of Co3 O4 nanoparticles, and helps to design cobalt-based catalysts with efficient use of Pt as a reduction promoter.
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Affiliation(s)
- Min Tang
- Materials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Petra E de Jongh
- Materials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Krijn P de Jong
- Materials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, 3584 CG, The Netherlands
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12
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Yao Y, Li Q, Chu W, Ding YM, Yan L, Gao Y, Neogi A, Govorov A, Zhou L, Wang Z. Exploration of the origin of the excellent charge-carrier dynamics in Ruddlesden-Popper oxysulfide perovskite Y 2Ti 2O 5S 2. Phys Chem Chem Phys 2023. [PMID: 38051151 DOI: 10.1039/d3cp02860g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Although the efficient separation of electron-hole (e-h) pairs is one of the most sought-after electronic characteristics of materials, due to thermally induced atomic motion and other factors, they do not remain separated during the carrier transport process, potentially leading to rapid carrier recombination. Here, we utilized real-time time-dependent density functional theory in combination with nonadiabatic molecular dynamics (NAMD) to explore the separated dynamic transport path within Ruddlesden-Popper oxysulfide perovskite Y2Ti2O5S2 caused by the dielectric layer and phonon frequency difference. The underlying origin of the efficient overall water splitting in Y2Ti2O5S2 is systematically explored. We report the existence of the bi-directional e-h separate-path transport, in which, the electrons transport in the Ti2O5 layer and the holes diffuse in the rock-salt layer. This is in contrast to the conventional e-h separated distribution with a crowded transport channel, as observed in SrTiO3 and hybrid perovskites. Such a unique feature finally results in a long carrier lifetime of 321 ns, larger than that in the SrTiO3 perovskite (160 ns) with only one carrier transport channel. This work provides insights into the carrier transport in lead-free perovskites and yields a novel design strategy for next-generation functionalized optoelectronic devices.
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Affiliation(s)
- Yisen Yao
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China.
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Qiaoqiao Li
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Weibin Chu
- Key Laboratory of Computational Physical Sciences (Ministry of Education), Institute of Computational Physical Sciences, Fudan University, Shanghai 200433, China
| | - Yi-Min Ding
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China.
| | - Luo Yan
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Yang Gao
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China.
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Arup Neogi
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Alexander Govorov
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA.
| | - Liujiang Zhou
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China.
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Zhiming Wang
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China.
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
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13
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Fu C, Li F, Wu Z, Xiong F, Zhu J, Gong XQ, Huang W. Traces of Potassium Induce Restructuring of the Anatase TiO 2(001)-(1×4) Surface from a Reactive to an Inert Structure. J Phys Chem Lett 2023; 14:8916-8921. [PMID: 37768115 DOI: 10.1021/acs.jpclett.3c02047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
Reconstruction of solid surfaces is generally accompanied by changes in surface activities. Here, via a combined experimental and theoretical study, we successfully identified that a trace amount of potassium dopant restructures the mineral anatase TiO2(001) single-crystal surface from an added molecule (ADM) termination to an added oxygen (AOM) one without changing the (1×4) periodicity. The anatase TiO2(001)-(1×4)-ADM surface terminated with 4-fold coordinated Ti4c and 2-fold coordinated O2c sites is (photo)catalytically active, whereas the anatase TiO2(001)-(1×4)-AOM surface terminated with O2c and inaccessible 5-fold coordinated Ti5c sites is inert. These results unveiled a mechanism of dopant-induced transformation from a reactive to an inert TiO2(001)-(1×4) surface, which unifies the existing arguments about the surface structures and (photo)catalytic activity of anatase TiO2(001)-(1×4).
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Affiliation(s)
- Cong Fu
- Key Laboratory of Precision and Intelligent Chemistry, iChEM, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Fei Li
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Zongfang Wu
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Feng Xiong
- Key Laboratory of Precision and Intelligent Chemistry, iChEM, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Xue-Qing Gong
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Weixin Huang
- Key Laboratory of Precision and Intelligent Chemistry, iChEM, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China
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14
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You R, Ou Y, Qi R, Yu J, Wang F, Jiang Y, Zou S, Han ZK, Yuan W, Yang H, Zhang Z, Wang Y. Revealing Temperature-Dependent Oxidation Dynamics of Ni Nanoparticles via Ambient Pressure Transmission Electron Microscopy. NANO LETTERS 2023; 23:7260-7266. [PMID: 37534944 DOI: 10.1021/acs.nanolett.3c00923] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
Understanding the oxidation mechanism of metal nanoparticles under ambient pressure is extremely important to make the best use of them in a variety of applications. Through ambient pressure transmission electron microscopy, we in situ investigated the dynamic oxidation processes of Ni nanoparticles at different temperatures under atmospheric pressure, and a temperature-dependent oxidation behavior was revealed. At a relatively low temperature (e.g., 600 °C), the oxidation of Ni nanoparticles underwent a classic Kirkendall process, accompanied by the formation of oxide shells. In contrast, at a higher temperature (e.g., 800 °C), the oxidation began with a single crystal nucleus at the metal surface and then proceeded along the metal/oxide interface without voids formed during the whole process. Through our experiments and density functional theory calculations, a temperature-dependent oxidation mechanism based on Ni nanoparticles was proposed, which was derived from the discrepancy of gas adsorption and diffusion rates under different temperatures.
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Affiliation(s)
- Ruiyang You
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yang Ou
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Rui Qi
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Jian Yu
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Fei Wang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ying Jiang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shihui Zou
- Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zhong-Kang Han
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wentao Yuan
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030000, China
| | - Hangsheng Yang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030000, China
| | - Ze Zhang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yong Wang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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15
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Su C, Han L, An H, Cai W, Shao X. Structures of water on the surface of anatase TiO 2 studied by diffuse reflectance near-infrared spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 296:122674. [PMID: 36996517 DOI: 10.1016/j.saa.2023.122674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/05/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
Investigating the structures of water on metal oxides is helpful for understanding the mechanism of the adsorptions in the presence of water. In this work, the structures of adsorbed water molecules on anatase TiO2 (101) were studied by diffuse reflectance near-infrared spectroscopy (DR-NIRS). With resolution enhanced spectrum by continuous wavelet transform (CWT), the spectral features of adsorbed water at different sites were found. In the spectrum of dried TiO2 powder, there is only the spectral feature of the water adsorbed at 5-coordinated titanium atoms (Ti5c). With the increase of the adsorbed water, the spectral feature of the water at 2-coordinated oxygen atoms (O2c) emerges first, and then that of the water interacting with the adsorbed water can be observed. When adenosine triphosphate (ATP) was adsorbed on TiO2, the intensity of the peaks related to the adsorbed water decreases, indicating that the adsorbed water is replaced by ATP due to the strong affinity to Ti5c. Therefore, there is a clear correlation between the peak intensity of the adsorbed water and the adsorbed quantity of ATP. Water can be a NIR spectroscopic probe to detect the quantity of the adsorbed ATP. A partial least squares (PLS) model was established to predict the content of adsorbed ATP by the spectral peaks of water. The recoveries of validation samples are in the range of 92.00-114.96% with the relative standard deviations (RSDs) in a range of 2.13-5.82%.
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Affiliation(s)
- Changlin Su
- Research Center for Analytical Sciences, Frontiers Science Center for New Organic Matter, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China; Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Li Han
- Research Center for Analytical Sciences, Frontiers Science Center for New Organic Matter, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China; Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Hongle An
- Research Center for Analytical Sciences, Frontiers Science Center for New Organic Matter, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China; Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Wensheng Cai
- Research Center for Analytical Sciences, Frontiers Science Center for New Organic Matter, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China; Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Xueguang Shao
- Research Center for Analytical Sciences, Frontiers Science Center for New Organic Matter, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China; Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China.
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16
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Xiao P, Yun X, Chen Y, Guo X, Gao P, Zhou G, Zheng C. Insights into the solvation chemistry in liquid electrolytes for lithium-based rechargeable batteries. Chem Soc Rev 2023; 52:5255-5316. [PMID: 37462967 DOI: 10.1039/d3cs00151b] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
Lithium-based rechargeable batteries have dominated the energy storage field and attracted considerable research interest due to their excellent electrochemical performance. As indispensable and ubiquitous components, electrolytes play a pivotal role in not only transporting lithium ions, but also expanding the electrochemical stable potential window, suppressing the side reactions, and manipulating the redox mechanism, all of which are closely associated with the behavior of solvation chemistry in electrolytes. Thus, comprehensively understanding the solvation chemistry in electrolytes is of significant importance. Here we critically reviewed the development of electrolytes in various lithium-based rechargeable batteries including lithium-metal batteries (LMBs), nonaqueous lithium-ion batteries (LIBs), lithium-sulfur batteries (LSBs), lithium-oxygen batteries (LOBs), and aqueous lithium-ion batteries (ALIBs), and emphasized the effects of interactions between cations, anions, and solvents on solvation chemistry, and functions of solvation chemistry in different types of electrolytes (strong solvating electrolytes, moderate solvating electrolytes, and weak solvating electrolytes) on the electrochemical performance and redox mechanism in the abovementioned rechargeable batteries. Specifically, the significant effects of solvation chemistry on the stability of electrode-electrolyte interphases, suppression of lithium dendrites in LMBs, inhibition of the co-intercalation of solvents in LIBs, improvement of anodic stability at high cut-off voltages in LMBs, LIBs and ALIBs, regulation of redox pathways in LSBs and LOBs, and inhibition of hydrogen/oxygen evolution reactions in LOBs are thoroughly summarized. Finally, the review concludes with a prospective outlook, where practical issues of electrolytes, advanced in situ/operando techniques to illustrate the mechanism of solvation chemistry, and advanced theoretical calculation and simulation techniques such as "material knowledge informed machine learning" and "artificial intelligence (AI) + big data" driven strategies for high-performance electrolytes have been proposed.
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Affiliation(s)
- Peitao Xiao
- College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China.
| | - Xiaoru Yun
- College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China.
| | - Yufang Chen
- College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China.
| | - Xiaowei Guo
- College of Computer, National University of Defense Technology, Changsha, Hunan, 410073, China
| | - Peng Gao
- College of Materials Science and Engineering, Hunan Joint International Laboratory of Advanced Materials and Technology of Clean Energy, Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University Changsha, Changsha, Hunan, 410082, China
| | - Guangmin Zhou
- Tsinghua-Berkeley Shenzhen Institute & Tsinghua, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
| | - Chunman Zheng
- College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China.
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17
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Qu J, Sui M, Li R. Recent advances in in-situ transmission electron microscopy techniques for heterogeneous catalysis. iScience 2023; 26:107072. [PMID: 37534164 PMCID: PMC10391733 DOI: 10.1016/j.isci.2023.107072] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023] Open
Abstract
The process of heterogeneous catalytic reaction under working conditions has long been considered a "black box", which is mainly because of the difficulties in directly characterizing the structural changes of catalysts at the atomic level during catalytic reactions. The development of in situ transmission electron microscopy (TEM) techniques offers opportunities for introducing a realistic chemical reaction environment in TEM, making it possible to uncover the mystery of catalytic reactions. In this article, we present a comprehensive overview of the application of in situ TEM techniques in heterogeneous catalysis, highlighting its utility for observing gas-solid and liquid-solid reactions during thermal catalysis, electrocatalysis, and photocatalysis. in situ TEM has a unique advantage in revealing the complex structural changes of catalysts during chemical reactions. Revealing the real-time dynamic structure during reaction processes is crucial for understanding the intricate relationship between catalyst structure and its catalytic performance. Finally, we present a perspective on the future challenges and opportunities of in situ TEM in heterogeneous catalysis.
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Affiliation(s)
- Jiangshan Qu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM-2011), Dalian 116023, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Manling Sui
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| | - Rengui Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM-2011), Dalian 116023, China
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18
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Li Y, Xu G, Chen J, Yu T, Miao P, Du Y. One-step synthesis of chiral molecularly imprinted polymer TiO 2 nanoparticles for enantioseparation of phenylalanine in coated capillary electrochromatography. Mikrochim Acta 2023; 190:279. [PMID: 37391671 DOI: 10.1007/s00604-023-05854-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/29/2023] [Indexed: 07/02/2023]
Abstract
A novel chiral molecularly imprinted polymer TiO2 nanoparticle was synthesized in one step for the enantioseparation of phenylalanine in coated capillary electrochromatography. To the author's knowledge, the chiral molecularly imprinted nanomaterials have still not been reported, to date. Chiral molecularly imprinted TiO2 nanomaterials (L-PHE@MIP(APTES-TEOS)@TiO2) were used as a chiral stationary phase to separate the phenylalanine enantiomers in coated capillary electrochromatography (CEC). The imprinted coating was prepared from L-phenylalanine (L-PHE) as the template, TiO2 nanoparticles (NPs) as the support substrate, 3-aminopropyltriethoxysilane (APTES) as the functional monomer, and tetraethyl silicate (TEOS) as the cross-linker. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used for the characterization of the L-PHE@MIP(APTES-TEOS)@TiO2@capillary. Fourier transform infrared spectra (FT-IR), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) were employed for the characterization of the L-PHE@MIP(APTES-TEOS)@TiO2. The effects of the applied voltage, pH value, buffer concentration, and acetonitrile content were investigated experimentally to determine the optimum conditions for CEC. The best resolution for phenylalanine enantiomers by CEC reached a value of 3.48. In addition, the specific recognition effect of L-PHE@MIP(APTES-TEOS)@TiO2 on PHE enantiomers was studied by selective experiment. Finally, adsorption kinetic research, adsorption equilibrium isotherm study, and adsorption thermodynamic experiment were carried out to investigate the separation mechanism of PHE enantiomers with the L-PHE@MIP (APTES-TEOS)@TiO2@capillary, and the results were consistent with those of CEC experiments.
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Affiliation(s)
- Yuchen Li
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Guangfu Xu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Jiaquan Chen
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Tao Yu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Pandeng Miao
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China
| | - Yingxiang Du
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No. 24 Tongjiaxiang, Jiangsu, 210009, Nanjing, People's Republic of China.
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, Nanjing, People's Republic of China.
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19
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Chao HY, Venkatraman K, Moniri S, Jiang Y, Tang X, Dai S, Gao W, Miao J, Chi M. In Situ and Emerging Transmission Electron Microscopy for Catalysis Research. Chem Rev 2023. [PMID: 37327473 DOI: 10.1021/acs.chemrev.2c00880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Catalysts are the primary facilitator in many dynamic processes. Therefore, a thorough understanding of these processes has vast implications for a myriad of energy systems. The scanning/transmission electron microscope (S/TEM) is a powerful tool not only for atomic-scale characterization but also in situ catalytic experimentation. Techniques such as liquid and gas phase electron microscopy allow the observation of catalysts in an environment conducive to catalytic reactions. Correlated algorithms can greatly improve microscopy data processing and expand multidimensional data handling. Furthermore, new techniques including 4D-STEM, atomic electron tomography, cryogenic electron microscopy, and monochromated electron energy loss spectroscopy (EELS) push the boundaries of our comprehension of catalyst behavior. In this review, we discuss the existing and emergent techniques for observing catalysts using S/TEM. Challenges and opportunities highlighted aim to inspire and accelerate the use of electron microscopy to further investigate the complex interplay of catalytic systems.
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Affiliation(s)
- Hsin-Yun Chao
- Center for Nanophase Materials Sciences, One Bethel Valley Road, Building 4515, Oak Ridge, Tennessee 37831-6064, United States
| | - Kartik Venkatraman
- Center for Nanophase Materials Sciences, One Bethel Valley Road, Building 4515, Oak Ridge, Tennessee 37831-6064, United States
| | - Saman Moniri
- Department of Physics and Astronomy and California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
| | - Yongjun Jiang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Xuan Tang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Sheng Dai
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Wenpei Gao
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Jianwei Miao
- Department of Physics and Astronomy and California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, One Bethel Valley Road, Building 4515, Oak Ridge, Tennessee 37831-6064, United States
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20
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Zhang J, Li L, Li H. Adsorption-Controlled Wettability and Self-Cleaning of TiO 2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6188-6200. [PMID: 37073727 DOI: 10.1021/acs.langmuir.3c00324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Molecular adsorption on solids is inevitable and has significant influences on the wettability of materials, while the tuning mechanism of the wettability from molecular adsorption is yet to be understood. Using molecular dynamics (MD) simulations, we comprehensively studied the relation between the wettability of the TiO2 surface and the adsorption of water and carboxylic acid molecules. Our results reveal that the increasing amount of surface hydroxyl groups from the decomposition adsorption of H2O increases the hydrophilicity of TiO2, providing molecular-level evidence for the previously proposed mechanism of photo-induced hydrophilicity. By contrast, the surface wettability becomes tunable with water contact angles changing from 0 to ∼130° through length adjustment of the adsorbed carboxylic acids. The TiO2 surface is hydrophilic with the adsorption of short-alkyl-chain carboxylic acids (e.g., HCOOH) and becomes hydrophobic when longer-alkyl-chain carboxylic acids (H(CH2)nCOOH, n > 2) are present. Furthermore, long-alkyl-chain acids also increase surface oleophilicity, while the adsorption of HCOOH and CH3COOH significantly enhances the oleophobicity of TiO2. Water molecules can also more easily penetrate the space between oily contaminants and adsorbed short acid molecules, thereby further increasing its self-cleaning capacity. The present simulations not only reveal the mechanism of wettability caused by molecular adsorption but also provide a promising method to create materials with controllable wettability and high self-cleaning efficiency.
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Affiliation(s)
- Jingyan Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemistry Technology, Beijing 100029, China
| | - Lei Li
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Hui Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemistry Technology, Beijing 100029, China
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21
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Chen J, Wang F, Wen Y, Tang W, Peng L. Emerging Applications of 17O Solid-State NMR Spectroscopy for Catalytic Oxides. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- Junchao Chen
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Fang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yujie Wen
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Weiping Tang
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Luming Peng
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
- Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210093, China
- Frontiers Science Center for Critical Earth Material Cycling (FSC-CEMaC), Nanjing University, Nanjing, Jiangsu 210023, China
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22
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Time-resolved transmission electron microscopy for nanoscale chemical dynamics. Nat Rev Chem 2023; 7:256-272. [PMID: 37117417 DOI: 10.1038/s41570-023-00469-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/12/2023] [Indexed: 02/24/2023]
Abstract
The ability of transmission electron microscopy (TEM) to image a structure ranging from millimetres to Ångströms has made it an indispensable component of the toolkit of modern chemists. TEM has enabled unprecedented understanding of the atomic structures of materials and how structure relates to properties and functions. Recent developments in TEM have advanced the technique beyond static material characterization to probing structural evolution on the nanoscale in real time. Accompanying advances in data collection have pushed the temporal resolution into the microsecond regime with the use of direct-electron detectors and down to the femtosecond regime with pump-probe microscopy. Consequently, studies have deftly applied TEM for understanding nanoscale dynamics, often in operando. In this Review, time-resolved in situ TEM techniques and their applications for probing chemical and physical processes are discussed, along with emerging directions in the TEM field.
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23
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Cui W, Lin W, Lu W, Liu C, Gao Z, Ma H, Zhao W, Van Tendeloo G, Zhao W, Zhang Q, Sang X. Direct observation of cation diffusion driven surface reconstruction at van der Waals gaps. Nat Commun 2023; 14:554. [PMID: 36732335 PMCID: PMC9894939 DOI: 10.1038/s41467-023-35972-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 01/11/2023] [Indexed: 02/04/2023] Open
Abstract
Weak interlayer van der Waals (vdW) bonding has significant impact on the surface/interface structure, electronic properties, and transport properties of vdW layered materials. Unraveling the complex atomistic dynamics and structural evolution at vdW surfaces is therefore critical for the design and synthesis of the next-generation vdW layered materials. Here, we show that Ge/Bi cation diffusion along the vdW gap in layered GeBi2Te4 (GBT) can be directly observed using in situ heating scanning transmission electron microscopy (STEM). The cation concentration variation during diffusion was correlated with the local Te6 octahedron distortion based on a quantitative analysis of the atomic column intensity and position in time-elapsed STEM images. The in-plane cation diffusion leads to out-of-plane surface etching through complex structural evolutions involving the formation and propagation of a non-centrosymmetric GeTe2 triple layer surface reconstruction on fresh vdW surfaces, and GBT subsurface reconstruction from a septuple layer to a quintuple layer. Our results provide atomistic insight into the cation diffusion and surface reconstruction in vdW layered materials.
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Affiliation(s)
- Wenjun Cui
- grid.162110.50000 0000 9291 3229State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 China ,grid.162110.50000 0000 9291 3229Nanostructure Research Center, Wuhan University of Technology, Wuhan, 430070 China
| | - Weixiao Lin
- grid.162110.50000 0000 9291 3229State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 China ,grid.162110.50000 0000 9291 3229Nanostructure Research Center, Wuhan University of Technology, Wuhan, 430070 China
| | - Weichao Lu
- grid.162110.50000 0000 9291 3229State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 China ,grid.162110.50000 0000 9291 3229Nanostructure Research Center, Wuhan University of Technology, Wuhan, 430070 China
| | - Chengshan Liu
- grid.162110.50000 0000 9291 3229State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 China
| | - Zhixiao Gao
- grid.497420.c0000 0004 1798 1132School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580 Shandong China
| | - Hao Ma
- grid.497420.c0000 0004 1798 1132School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580 Shandong China
| | - Wen Zhao
- grid.497420.c0000 0004 1798 1132School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580 Shandong China
| | - Gustaaf Van Tendeloo
- grid.162110.50000 0000 9291 3229Nanostructure Research Center, Wuhan University of Technology, Wuhan, 430070 China ,grid.5284.b0000 0001 0790 3681Electron Microscopy for Materials Science (EMAT), University of Antwerp, Antwerp, B-2020 Belgium
| | - Wenyu Zhao
- grid.162110.50000 0000 9291 3229State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 China
| | - Qingjie Zhang
- grid.162110.50000 0000 9291 3229State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 China
| | - Xiahan Sang
- grid.162110.50000 0000 9291 3229State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 China ,grid.162110.50000 0000 9291 3229Nanostructure Research Center, Wuhan University of Technology, Wuhan, 430070 China
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24
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Affiliation(s)
- Jinrun Dong
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Jiandong Feng
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
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25
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Wang Y, Xu P, Xie W, Wang S, Chen Y, Yu N, Zhang S. Exploration of active sites of ethyl alcohol electro-oxidation on porous gold nanoparticles with enhanced Raman spectroscopy. RSC Adv 2023; 13:1333-1338. [PMID: 36686900 PMCID: PMC9811239 DOI: 10.1039/d2ra03863c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 12/05/2022] [Indexed: 01/05/2023] Open
Abstract
Novel porous gold nanospheres are prepared by calcination of the gold-urea complexes. The enhanced Raman spectra of ethanol catalyzed by different doses of porous gold nanospheres are measured with a 532 nm laser as the excitation source, and an enhanced charge coupled device served in spectral detection and microscopic imaging. The electrochemical experiments show that the catalytic oxidation products of ethanol with porous gold nanoparticles are acetaldehyde, acetic acid, and water, which further proved that the porous gold nanoparticles can activate the -CH2 of ethanol.
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Affiliation(s)
- Yusong Wang
- AnHui Provincial Engineering Research Center for Polysaccharide Drugs and Institute of Synthesis and Application of Medical Materials, Department of Pharmacy, Wannan Medical CollegeWuhu 241002P.R. China
| | - Peng Xu
- Anhui Normal UniversityWuhu 241002P. R. China
| | - Wenjie Xie
- AnHui Provincial Engineering Research Center for Polysaccharide Drugs and Institute of Synthesis and Application of Medical Materials, Department of Pharmacy, Wannan Medical CollegeWuhu 241002P.R. China
| | - Shaozhen Wang
- AnHui Provincial Engineering Research Center for Polysaccharide Drugs and Institute of Synthesis and Application of Medical Materials, Department of Pharmacy, Wannan Medical CollegeWuhu 241002P.R. China
| | - Yunyan Chen
- AnHui Provincial Engineering Research Center for Polysaccharide Drugs and Institute of Synthesis and Application of Medical Materials, Department of Pharmacy, Wannan Medical CollegeWuhu 241002P.R. China
| | - Nan Yu
- Anhui Normal UniversityWuhu 241002P. R. China
| | - Shengpeng Zhang
- AnHui Provincial Engineering Research Center for Polysaccharide Drugs and Institute of Synthesis and Application of Medical Materials, Department of Pharmacy, Wannan Medical CollegeWuhu 241002P.R. China
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26
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Pu Y, He B, Niu Y, Liu X, Zhang B. Chemical Electron Microscopy (CEM) for Heterogeneous Catalysis at Nano: Recent Progress and Challenges. RESEARCH (WASHINGTON, D.C.) 2023; 6:0043. [PMID: 36930759 PMCID: PMC10013794 DOI: 10.34133/research.0043] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 12/18/2022] [Indexed: 01/12/2023]
Abstract
Chemical electron microscopy (CEM), a toolbox that comprises imaging and spectroscopy techniques, provides dynamic morphological, structural, chemical, and electronic information about an object in chemical environment under conditions of observable performance. CEM has experienced a revolutionary improvement in the past years and is becoming an effective characterization method for revealing the mechanism of chemical reactions, such as catalysis. Here, we mainly address the concept of CEM for heterogeneous catalysis in the gas phase and what CEM could uniquely contribute to catalysis, and illustrate what we can know better with CEM and the challenges and future development of CEM.
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Affiliation(s)
- Yinghui Pu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang 110016, China
| | - Bowen He
- School of Chemistry and Chemical Engineering, In-situ Center for Physical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yiming Niu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang 110016, China
| | - Xi Liu
- School of Chemistry and Chemical Engineering, In-situ Center for Physical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Bingsen Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang 110016, China
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27
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He Y, Sheng J, Ren Q, Sun Y, Hao W, Dong F. Operando Identification of Dynamic Photoexcited Oxygen Vacancies as True Catalytic Active Sites. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ye He
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jianping Sheng
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Qin Ren
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yanjuan Sun
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Weichang Hao
- School of Physics and BUAA-UOW Joint Research Centre, Beihang University, Beijing 100191, China
| | - Fan Dong
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
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28
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Niu Y, Wang Y, Chen J, Li S, Huang X, Willinger MG, Zhang W, Liu Y, Zhang B. Patterning the consecutive Pd 3 to Pd 1 on Pd 2Ga surface via temperature-promoted reactive metal-support interaction. SCIENCE ADVANCES 2022; 8:eabq5751. [PMID: 36490336 PMCID: PMC9733920 DOI: 10.1126/sciadv.abq5751] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
Atom-by-atom control of a catalyst surface is a central yet challenging topic in heterogeneous catalysis, which enables precisely confined adsorption and oriented approach of reactant molecules. Here, exposed surfaces with either consecutive Pd trimers (Pd3) or isolated Pd atoms (Pd1) are architected for Pd2Ga intermetallic nanoparticles (NPs) using reactive metal-support interaction (RMSI). At elevated temperatures under hydrogen, in situ atomic-scale transmission electron microscopy directly visualizes the refacetting of Pd2Ga NPs from energetically favorable (013)/(020) facets to (011)/(002). Infrared spectroscopy and acetylene hydrogenation reaction complementarily confirm the evolution from consecutive Pd3 to Pd1 sites of Pd2Ga catalysts with the concurrent fingerprinting CO adsorption and featured reactivities. Through theoretical calculations and modeling, we reveal that the restructured Pd2Ga surface results from the preferential arrangement of additionally reduced Ga atoms on the surface. Our work provides previously unidentified mechanistic insight into temperature-promoted RMSI and possible solutions to control and rearrange the surface atoms of supported intermetallic catalyst.
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Affiliation(s)
- Yiming Niu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Yongzhao Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Junnan Chen
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Shiyan Li
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xing Huang
- Scientific Center for Optical and Electron Microscopy, ETH Zurich, Otto-Stern-Weg 3, Zurich 8093, Switzerland
- College of Chemistry, Fuzhou University, Fuzhou 36108, China
| | - Marc-Georg Willinger
- Scientific Center for Optical and Electron Microscopy, ETH Zurich, Otto-Stern-Weg 3, Zurich 8093, Switzerland
- School of Natural Science (NAT), Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, Garching 85747, Germany
| | - Wei Zhang
- School of Materials Science and Engineering, Key Laboratory of Automobile Materials MOE, and Electron Microscopy Center, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, China
| | - Yuefeng Liu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Bingsen Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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29
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Sustainable organic synthesis promoted on titanium dioxide using coordinated water and renewable energies/resources. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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30
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Sun X, Chen X, Fu C, Yu Q, Zheng XS, Fang F, Liu Y, Zhu J, Zhang W, Huang W. Molecular oxygen enhances H2O2 utilization for the photocatalytic conversion of methane to liquid-phase oxygenates. Nat Commun 2022; 13:6677. [PMID: 36335138 PMCID: PMC9637122 DOI: 10.1038/s41467-022-34563-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022] Open
Abstract
H2O2 is widely used as an oxidant for photocatalytic methane conversion to value-added chemicals over oxide-based photocatalysts under mild conditions, but suffers from low utilization efficiencies. Herein, we report that O2 is an efficient molecular additive to enhance the utilization efficiency of H2O2 by suppressing H2O2 adsorption on oxides and consequent photogenerated holes-mediated H2O2 dissociation into O2. In photocatalytic methane conversion over an anatase TiO2 nanocrystals predominantly enclosed by the {001} facets (denoted as TiO2{001})-C3N4 composite photocatalyst at room temperature and ambient pressure, O2 additive significantly enhances the utilization efficiency of H2O2 up to 93.3%, giving formic acid and liquid-phase oxygenates selectivities respectively of 69.8% and 97% and a formic acid yield of 486 μmolHCOOH·gcatalyst−1·h−1. Efficient charge separation within TiO2{001}-C3N4 heterojunctions, photogenerated holes-mediated activation of CH4 into ·CH3 radicals on TiO2{001} and photogenerated electrons-mediated activation of H2O2 into ·OOH radicals on C3N4, and preferential dissociative adsorption of methanol on TiO2{001} are responsible for the active and selective photocatalytic conversion of methane to formic acid over TiO2{001}-C3N4 composite photocatalyst. The oxidation of methane to formic acid or related oxygenates relies on efficient reaction with H2O2. Here, the authors report a TiO2-based catalyst to selectively form formic acid by using molecular O2 additives to avoid unwanted side reactions.
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31
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Wei J, Chen W, Zhou D, Cai J, Chen YX. Restructuring of well-defined Pt-based electrode surfaces under mild electrochemical conditions. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(22)64100-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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32
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Gui R, Yan Q, Xue T, Gao Y, Li Y, Zhu T, Wang Q. The promoting/inhibiting effect of water vapor on the selective catalytic reduction of NO x. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129665. [PMID: 35907283 DOI: 10.1016/j.jhazmat.2022.129665] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/02/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
In the field of nitrogen oxides (NOx) abatement, developing selective catalytic reduction (SCR) catalysts that can operate stably in the practical conditions remains a big challenge because of the complexity and uncertainty of actual flue gas emissions. As water vapor is unavoidable in the actual flue gas, it is indispensable to explore its effect on the performance of SCR catalysts. Many studies have proved that the effects of H2O on de-NOx activity of SCR catalysts were indeed observed during SCR reactions operated under wet conditions. Whether the effect is promotive or inhibitory depends on the reaction conditions, catalyst types and reducing agents used in SCR reaction. This review focuses on the effect of H2O on SCR catalysts and SCR reaction, including promoting effect, inhibiting effect, as well as the effecting mechanism. Besides, various strategies for developing a water-resistant SCR catalyst are also included. We hope that this work can give a more comprehensive insight into the effects of H2O on SCR catalysts and help with the rational design of water-resistant SCR catalysts for further practical application in NOx abatement field.
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Affiliation(s)
- Rongrong Gui
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Qinghua Yan
- Qingdao Engineering Research Center for Rural Environment, College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China
| | - Tianshan Xue
- Institute of Atmospheric Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Yanshan Gao
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Yuran Li
- Research Center for Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Tingyu Zhu
- Research Center for Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Qiang Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
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33
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Jin F, Zhao Z. Reactivity of anatase (001) surface from first-principles many-body Green's function theory. RSC Adv 2022; 12:28178-28184. [PMID: 36320267 PMCID: PMC9530998 DOI: 10.1039/d2ra05058g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 09/16/2022] [Indexed: 11/06/2022] Open
Abstract
The anatase (001) surface has attracted a lot of interest in surface science due to its excellent performance. However, its reactivity is under debate since it can undergo a (1 × 4) reconstruction. Herein, we applied the many-body Green's function theory to investigate the electronic properties and excitons as well as the water adsorption behavior of the (1 × 4) unreconstructed anatase (001) surface and two reconstructed patterns, namely ADM and AOM. Our results revealed that the high reactivity of the (001) surface is probably not relevant to the reconstructed shape. The unreconstructed (001) surface and reconstructed ADM surface were very reactive for dissociating H2O molecules among three surfaces, but the lower-energy singlet exciton for ADM was completely confined within the inner atomic layers in TiO2, which is unfavorable for hole transfer to the reactant on the surface. Also, the required photon energy for initiating photochemical reactions on the reconstructed ADM surface should be higher than for the unreconstructed (001) surface, implying it is more difficult for the reaction to happen on the former surface. The unreconstructed (001) surface exhibited the highest reactivity due to the smaller optical absorption edge and the photoholes distributed on surface sites. The unreconstructed (001) surface seems to have superior reactivity than the reconstructed shapes.![]()
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Affiliation(s)
- Fan Jin
- Department of Applied Chemistry, Yuncheng UniversityYuncheng 044000China
| | - Zhichao Zhao
- Department of Science Technology and Industry, Yuncheng UniversityYuncheng 044000China
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34
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Zhao H, Zhu Y, Ye H, He Y, Li H, Sun Y, Yang F, Wang R. Atomic-Scale Structure Dynamics of Nanocrystals Revealed By In Situ and Environmental Transmission Electron Microscopy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022:e2206911. [PMID: 36153832 DOI: 10.1002/adma.202206911] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/05/2022] [Indexed: 06/16/2023]
Abstract
Nanocrystals are of great importance in material sciences and industry. Engineering nanocrystals with desired structures and properties is no doubt one of the most important challenges in the field, which requires deep insight into atomic-scale dynamics of nanocrystals during the process. The rapid developments of in situ transmission electron microscopy (TEM), especially environmental TEM, reveal insights into nanocrystals to digest. According to the considerable progress based on in situ electron microscopy, a comprehensive review on nanocrystal dynamics from three aspects: nucleation and growth, structure evolution, and dynamics in reaction conditions are given. In the nucleation and growth part, existing nucleation theories and growth pathways are organized based on liquid and gas-solid phases. In the structure evolution part, the focus is on in-depth mechanistic understanding of the evolution, including defects, phase, and disorder/order transitions. In the part of dynamics in reaction conditions, solid-solid and gas-solid interfaces of nanocrystals in atmosphere are discussed and the structure-property relationship is correlated. Even though impressive progress is made, additional efforts are required to develop the integrated and operando TEM methodologies for unveiling nanocrystal dynamics with high spatial, energy, and temporal resolutions.
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Affiliation(s)
- Haofei Zhao
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yuchen Zhu
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Huanyu Ye
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yang He
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Hao Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yifei Sun
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Feng Yang
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Rongming Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China
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35
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Gu H, Lan J, Liu Y, Ling C, Wei K, Zhan G, Guo F, Jia F, Ai Z, Zhang L, Liu X. Water Enables Lattice Oxygen Activation of Transition Metal Oxides for Volatile Organic Compound Oxidation. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03552] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huayu Gu
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Jintong Lan
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Yi Liu
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Cancan Ling
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Kai Wei
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Guangming Zhan
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Furong Guo
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Falong Jia
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Zhihui Ai
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Lizhi Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xiao Liu
- Key Laboratory of Pesticide & Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
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36
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Liu S, Cheng Z, Yu R. Nematic-type Structure of the SnO 2 (110) Surface at Room Temperature. Chemphyschem 2022; 23:e202200338. [PMID: 35920796 DOI: 10.1002/cphc.202200338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/24/2022] [Indexed: 11/08/2022]
Abstract
The most exposed (110) surface of SnO2 plays an important role in practical applications like gas sensors and catalysts. It has previously been considered to be amorphous at room temperature. In this study, the structure of the (110) surface stabilized at room temperature is determined using aberration-corrected transmission electron microscopy and first-principles calculations. The (110) surface has local order and is made of Sn2 O2 strands that partially cover underlying unsaturated Sn rows. The results indicate that the Sn2 O2 strands assemble as building blocks on the surface to form a partially ordered structure, quite like the nematic liquid crystal. Partial occupation of the Sn2 O2 strands along the [ 1 1 ‾ 0] direction avoids the interaction between neighboring Sn2 O2 strands and therefore makes the surface more stable. The novel phenomenon of the surface provides insight for understanding and developing catalysts and gas sensors based on SnO2 .
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Affiliation(s)
- Shengsheng Liu
- School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.,Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing, 100084, China.,State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China
| | - Zhiying Cheng
- School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.,Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing, 100084, China.,State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China
| | - Rong Yu
- School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.,Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing, 100084, China.,State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China
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37
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Ou Y, Li S, Wang F, Duan X, Yuan W, Yang H, Zhang Z, Wang Y. Reversible transformation between terrace and step sites of Pt nanoparticles on titanium under CO and O2 environments. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63958-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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38
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Shen Y, Zhao X, Gong R, Ngo E, Maurice JL, Roca i Cabarrocas P, Chen W. Influence of the Electron Beam and the Choice of Heating Membrane on the Evolution of Si Nanowires’ Morphology in In Situ TEM. MATERIALS 2022; 15:ma15155244. [PMID: 35955179 PMCID: PMC9369465 DOI: 10.3390/ma15155244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/23/2022] [Accepted: 07/27/2022] [Indexed: 01/25/2023]
Abstract
We used in situ transmission electron microscopy (TEM) to observe the dynamic changes of Si nanowires under electron beam irradiation. We found evidence of structural evolutions under TEM observation due to a combination of electron beam and thermal effects. Two types of heating holders were used: a carbon membrane, and a silicon nitride membrane. Different evolution of Si nanowires on these membranes was observed. Regarding the heating of Si nanowires on a C membrane at 800 °C and above, a serious degradation dependent on the diameter of the Si nanowire was observed under the electron beam, with the formation of Si carbide. When the membrane was changed to Si nitride, a reversible sectioning and welding of the Si nanowire was observed.
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Affiliation(s)
- Ya Shen
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China; (Y.S.); (X.Z.); (R.G.)
| | - Xuechun Zhao
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China; (Y.S.); (X.Z.); (R.G.)
| | - Ruiling Gong
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China; (Y.S.); (X.Z.); (R.G.)
| | - Eric Ngo
- Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France; (E.N.); (J.-L.M.); (P.R.i.C.)
| | - Jean-Luc Maurice
- Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France; (E.N.); (J.-L.M.); (P.R.i.C.)
| | - Pere Roca i Cabarrocas
- Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France; (E.N.); (J.-L.M.); (P.R.i.C.)
| | - Wanghua Chen
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China; (Y.S.); (X.Z.); (R.G.)
- Correspondence:
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39
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Tang M, Wang Y. The Significant Role of the Atomic Surface Structure of Support in Strong Metal‐Support Interaction. Chemistry 2022; 28:e202104519. [DOI: 10.1002/chem.202104519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Min Tang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China
- Materials Chemistry and Catalysis Debye Institute for Nanomaterials Science Utrecht University 3584 CG Utrecht The Netherlands
| | - Yong Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China
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40
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Ma X, Shi Y, Liu J, Li X, Cui X, Tan S, Zhao J, Wang B. Hydrogen-Bond Network Promotes Water Splitting on the TiO 2 Surface. J Am Chem Soc 2022; 144:13565-13573. [DOI: 10.1021/jacs.2c03690] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaochuan Ma
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yongliang Shi
- Center for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
| | - Jianyi Liu
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xintong Li
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xuefeng Cui
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Shijing Tan
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Jin Zhao
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- ICQD/Hefei National Research Center for Physical Sciences at the Microscale, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Bing Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
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41
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Shen B, Wang H, Xiong H, Chen X, Bosch EGT, Lazić I, Qian W, Wei F. Atomic imaging of zeolite-confined single molecules by electron microscopy. Nature 2022; 607:703-707. [PMID: 35831496 DOI: 10.1038/s41586-022-04876-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 05/17/2022] [Indexed: 11/09/2022]
Abstract
Single-molecule imaging with atomic resolution is a notable method to study various molecular behaviours and interactions1-5. Although low-dose electron microscopy has been proved effective in observing small molecules6-13, it has not yet helped us achieve an atomic understanding of the basic physics and chemistry of single molecules in porous materials, such as zeolites14-16. The configurations of small molecules interacting with acid sites determine the wide applications of zeolites in catalysis, adsorption, gas separation and energy storage17-21. Here we report the atomic imaging of single pyridine and thiophene confined in the channel of zeolite ZSM-5 (ref. 22). On the basis of integrated differential phase contrast scanning transmission electron microscopy (iDPC-STEM)23-25, we directly observe the adsorption and desorption behaviours of pyridines in ZSM-5 under the in situ atmosphere. The adsorption configuration of single pyridine is atomically resolved and the S atoms in thiophenes are located after comparing imaging results with calculations. The strong interactions between molecules and acid sites can be visually studied in real-space images. This work provides a general strategy to directly observe these molecular structures and interactions in both the static image and the in situ experiment, expanding the applications of electron microscopy to the further study of various single-molecule behaviours with high resolution.
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Affiliation(s)
- Boyuan Shen
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China.,Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, China
| | - Huiqiu Wang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
| | - Hao Xiong
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
| | - Xiao Chen
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China.
| | - Eric G T Bosch
- Materials and Structural Analysis, Thermo Fisher Scientific, Eindhoven, The Netherlands
| | - Ivan Lazić
- Materials and Structural Analysis, Thermo Fisher Scientific, Eindhoven, The Netherlands
| | - Weizhong Qian
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
| | - Fei Wei
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China.
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42
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Ren Z, Ruan L, Yin L, Akkiraju K, Giordano L, Liu Z, Li S, Ye Z, Li S, Yang H, Wang Y, Tian H, Liu G, Shao-Horn Y, Han G. Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2202072. [PMID: 35580350 DOI: 10.1002/adma.202202072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Surface oxygen vacancies have been widely discussed to be crucial for tailoring the activity of various chemical reactions from CO, NO, to water oxidation by using oxide-supported catalysts. However, the real role and potential function of surface oxygen vacancies in the reaction remains unclear because of their very short lifetime. Here, it is reported that surface oxygen vacancies can be well confined electrostatically for a polarization screening near the perimeter interface between Pt {111} nanocrystals and the negative polar surface (001) of ferroelectric PbTiO3. Strikingly, such a catalyst demonstrates a tunable catalytic CO oxidation kinetics from 200 °C to near room temperature by increasing the O2 gas pressure, accompanied by the conversion curve from a hysteresis-free loop to one with hysteresis. The combination of reaction kinetics, electronic energy loss spectroscopy (EELS) analysis, and density functional theory (DFT) calculations, indicates that the oxygen vacancies stabilized by the negative polar surface are the active sites for O2 adsorption as a rate-determining step, and then dissociated O moves to the surface of the Pt nanocrystals for oxidizing adsorbed CO. The results open a new pathway for tunable catalytic activity of CO oxidation.
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Affiliation(s)
- Zhaohui Ren
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
- Research Center for Intelligent Sensing, Zhejiang Lab, Hangzhou, 311100, China
| | - Luoyuan Ruan
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
- Research Center for Sensing Materials and Devices, Zhejiang Lab, Hangzhou, 311121, China
| | - Lichang Yin
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Karthik Akkiraju
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Livia Giordano
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Zhongran Liu
- Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Shi Li
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Zixing Ye
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Songda Li
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Hangsheng Yang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Yong Wang
- Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - He Tian
- Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Gang Liu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Yang Shao-Horn
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Gaorong Han
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
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43
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Zhang L, Li Y, Zhang L, Wang K, Li Y, Wang L, Zhang X, Yang F, Zheng Z. Direct Visualization of the Evolution of a Single-Atomic Cobalt Catalyst from Melting Nanoparticles with Carbon Dissolution. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200592. [PMID: 35508897 PMCID: PMC9284138 DOI: 10.1002/advs.202200592] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/14/2022] [Indexed: 05/11/2023]
Abstract
Transition metal single-atom catalysts (SACs) are of immense interest, but how exactly they are evolved upon pyrolysis of the corresponding precursors remains unclear as transition metal ions in the complex precursor undergo a series of morphological changes accompanied with changes in oxidation state as a result of the interactions with the carbon support. Herein, the authors record the complete evolution process of Co SAC during the pyrolysis a Co/Zn-containing zeolitic imidazolate framework. Aberration-corrected environmental TEM coupled with in-situ EELS is used for direct visualization of the evolution process at 200-1000 °C. Dissolution of carbon into the nanoparticles of Co is found to be key to modulating the wetting behavior of nanoparticles on the carbon support; melting of Co nanoparticles and their motion within the zeolitic architecture leads to the etching of the framework structure, yielding porous C/N support onto which Co-single atoms reside. This uniquely structured Co SAC is found to be effective for the oxidation of a series of aromatic alkanes to produce selective ketones among other possible products. The carbon dissolution and melting/sublimation-driven structural dynamics of transition metal revealed here will expand the methodology in synthesizing SACs and other high-temperature processes.
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Affiliation(s)
- Luyao Zhang
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
| | - Yanyan Li
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
| | - Lei Zhang
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
| | - Kun Wang
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
| | - Yingbo Li
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
| | - Lei Wang
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
| | - Xinyu Zhang
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
| | - Feng Yang
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
| | - Zhiping Zheng
- Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerKey Laboratory of Energy Conversion and Storage Technologies (Ministry of Education)Southern University of Science and TechnologyShenzhen518055China
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44
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Peng X, Zhu FC, Jiang YH, Sun JJ, Xiao LP, Zhou S, Bustillo KC, Lin LH, Cheng J, Li JF, Liao HG, Sun SG, Zheng H. Identification of a quasi-liquid phase at solid-liquid interface. Nat Commun 2022; 13:3601. [PMID: 35739085 PMCID: PMC9226024 DOI: 10.1038/s41467-022-31075-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 05/31/2022] [Indexed: 11/17/2022] Open
Abstract
An understanding of solid–liquid interfaces is of great importance for fundamental research as well as industrial applications. However, it has been very challenging to directly image solid–liquid interfaces with high resolution, thus their structure and properties are often unknown. Here, we report a quasi-liquid phase between metal (In, Sn) nanoparticle surfaces and an aqueous solution observed using liquid cell transmission electron microscopy. Our real-time high-resolution imaging reveals a thin layer of liquid-like materials at the interfaces with the frequent appearance of small In nanoclusters. Such a quasi-liquid phase serves as an intermediate for the mass transport from the metal nanoparticle to the liquid. Density functional theory-molecular dynamics simulations demonstrate that the positive charges of In ions greatly contribute to the stabilization of the quasi-liquid phase on the metal surface. Solid–liquid interfaces are ubiquitous in natural and technological processes, but their imaging at the atomic scale has been challenging. The authors, using liquid-phase transmission electron microscopy, identify a quasi-liquid phase and the mass transport between the surface of In and Sn nanocrystals and an aqueous solution.
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Affiliation(s)
- Xinxing Peng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.,Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.,National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Fu-Chun Zhu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - You-Hong Jiang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Juan-Juan Sun
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Liang-Ping Xiao
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Shiyuan Zhou
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Karen C Bustillo
- National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Long-Hui Lin
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Jun Cheng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Jian-Feng Li
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Hong-Gang Liao
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
| | - Shi-Gang Sun
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Haimei Zheng
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA. .,Department of Material Science and Engineering, University of California, Berkeley, CA, 94720, USA.
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45
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You R, Wu Z, Yu J, Wang F, Chen S, Han ZK, Yuan W, Yang H, Wang Y. Revealing Surface Restraint-Induced Hexagonal Pd Nanocrystals via In Situ Transmission Electron Microscopy. NANO LETTERS 2022; 22:4333-4339. [PMID: 35584407 DOI: 10.1021/acs.nanolett.2c00411] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Achieving metal nanocrystals with metastable phase draws much attention due to their anticipated fascinating properties, wheras it is still challenging because their polymorphism nature and phase transition mechanism remain elusive. Here, phase stability of face-centered cubic (fcc) Pd nanocrystals was studied via in situ spherical aberration (Cs)-corrected transmission electron microscopy (TEM). By constructing a well-defined Pd/C composite structure, Pd nanocrystals encapsulated by graphite, the dispersion process of fcc Pd was observed through a nucleation and growth process. Interestingly, Cs-corrected scanning TEM analysis demonstrated that the newly formed Pd nanocrystals could adopt a metastable hexagonal phase, which was considered challenging to obtain. Accordingly, formation mechanism of the hexagonal Pd nanocrystals was proposed, which involved the combined effect of two factors: (1) templating of graphite and (2) size effect. This work is expected to offer new insight into the polymorphism of Pd nanocrystals and pave the way for the future design of metastable metal nanomaterials.
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Affiliation(s)
- Ruiyang You
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhemin Wu
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jian Yu
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Fei Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shiyuan Chen
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhong-Kang Han
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Wentao Yuan
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hangsheng Yang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yong Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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46
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Revealing synergetic structural activation of a CuAu surface during water-gas shift reaction. Proc Natl Acad Sci U S A 2022; 119:e2120088119. [PMID: 35648821 DOI: 10.1073/pnas.2120088119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Significance Atomic-level in situ environmental transmission electron microscopy observation of the dynamic activation process on a low-indexed CuAu surface under water-gas shift reaction (WGSR) condition has been revealed. The atomic-scale structural activation of a CuAu surface features a gas-dependent periodic surface restructuring and elemental ordering, explaining the "synergy effect" from the structural point of view. These real-time changes under relevant reactant gases and temperature are correlated with the reaction route of WGSR corroborated by density functional theory-based calculation and ab initio molecular dynamics simulation and can provide insights for atom-precision catalyst design.
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47
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Yang Z, Zhang J, Wang J, Hu Y. Sandwich-like photocatalyst MIL-101@TiO 2@PDVB with water resistance for efficient oxidation of toluene. CHEMOSPHERE 2022; 296:133921. [PMID: 35183588 DOI: 10.1016/j.chemosphere.2022.133921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 01/28/2022] [Accepted: 02/06/2022] [Indexed: 06/14/2023]
Abstract
The coordination of H2O with the metal nodes of MOFs destroys the framework of MOFs, which severely inhibits the application of MOFs in the actual environment. In this work, sandwich-like MIL-101@TiO2@PDVB composite was synthesized by in-situ hydrothermal and thermal deposition methods and used for the photocatalytic oxidation of toluene under high humidity. The result showed that the composite material had outstanding hydrophobic property with a water contact angle of 142.5°. When relative humidity (RH) was 60%, MIL-101@TiO2@PDVB and MIL-101@TiO2 exhibited an excellent photocatalytic activity for toluene degradation. When RH was 90%, the photocatalytic activity of MIL-101@TiO2 was severely inhibited, while MIL-101@TiO2@PDVB showed high resistance to water. The semi-encapsulated form of PDVB effectively resisted the erosion of H2O while providing enough ·OH, and ensured the effective contact between the composites and toluene molecules. MIL-101@TiO2@PDVB also exhibited remarkable adsorption-photocatalytic performance in the degradation of liquid phase organic pollutant. MIL-101@TiO2@PDVB maintained high stability in long-term alkali resistance experiment and cyclic reaction test. This work provided new insights for the preparation of hydrophobic MOFs based functional materials and their applications for photocatalytic purification of VOCs.
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Affiliation(s)
- Zhenxiang Yang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Jinhui Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Jun Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Yun Hu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou, 510006, PR China; Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal, Guangzhou, 510006, PR China.
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Zhang F, Zhang X, Jia Z, Liu W. Precise Drift Tracking for In Situ Transmission Electron Microscopy via a Thon-Ring Based Sample Position Measurement. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2022; 28:1-7. [PMID: 35599605 DOI: 10.1017/s1431927622000691] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Visualizing how a catalyst behaves during chemical reactions using in situ transmission electron microscopy (TEM) is crucial for understanding the activity origin and guiding performance optimization. However, the sample drifts as temperature changes during in situ reaction, which weakens the resolution and stability of TEM imaging, blocks insights into the dynamic details of catalytic reaction. Herein, a Thon-ring based sample position measurement (TSPM) was developed to track the sample height variation during in situ TEM observation. Drifting characteristics for three commercially available nanochips were studied, showing large biases in aspects of shifting modes, expansion heights, as well as the thermal conduction hysteresis during rapid heating. Particularly, utilizing the TSPM method, for the first time, the gas layer thickness inside a gas-cell nanoreactor was precisely determined, which varies with reaction temperature and gas pressure in a linear manner with coefficients of ~8 nm/°C and ~50 nm/mbar, respectively. Following drift prediction of TSPM, fast oxidation kinetics of a Ni particle was tracked in real time for 12 s at 500°C. This TSPM method is expected to facilitate the functionality of automatic target tracing for in situ microscopy applications when feedback to hardware control of the microscope.
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Affiliation(s)
- Fan Zhang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, Dalian, Liaoning 116023, China
- University of Chinese Academy of Sciences, Beijing 101408, China
| | - Xiaoben Zhang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, Dalian, Liaoning 116023, China
- University of Chinese Academy of Sciences, Beijing 101408, China
| | - Zhenghao Jia
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Wei Liu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, Dalian, Liaoning 116023, China
- University of Chinese Academy of Sciences, Beijing 101408, China
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Data Synchronization in Operando Gas and Heating TEM. Ultramicroscopy 2022; 238:113549. [DOI: 10.1016/j.ultramic.2022.113549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 04/25/2022] [Accepted: 05/04/2022] [Indexed: 11/16/2022]
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50
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Abstract
AbstractThe development of efficient electrocatalysts based on non-noble metals for oxygen evolution reaction (OER) remains an important and challenging task. Multinuclear transition-metal clusters with high structural stability are promising OER catalysts but their catalytic role is poorly understood. Here we report the crystallographic observation of OER activity over robust {Ni12}-clusters immobilised in a porous metal-organic framework, NKU-100, by single-crystal X-ray diffraction as a function of external applied potential. We observed the aggregation of confined oxygen species around the {Ni12}-cluster as a function of applied potential during the electrocatalytic process. The refined occupancy of these oxygen species shows a strong correlation with the variation of current density. This study demonstrates that the enrichment of oxygen species in the secondary co-ordination sphere of multinuclear transition-metal clusters can promote the OER activity.
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