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Liang Z, Xie S, Wang Q, Zhang B, Xiao L, Wang C, Liu X, Chen Y, Yang S, Du H, Qian Y, Ling D, Wu L, Li F. Ligand-Induced Atomically Segregation-Tunable Alloy Nanoprobes for Enhanced Magnetic Resonance Imaging. ACS NANO 2024; 18:15249-15260. [PMID: 38818704 DOI: 10.1021/acsnano.4c03999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Bimetallic iron-noble metal alloy nanoparticles have emerged as promising contrast agents for magnetic resonance imaging (MRI) due to their biocompatibility and facile control over the element distribution. However, the inherent surface energy discrepancy between iron and noble metal often leads to Fe atom segregation within the nanoparticle, resulting in limited iron-water molecule interactions and, consequently, diminished relaxometric performance. In this study, we present the development of a class of ligand-induced atomically segregation-tunable alloy nanoprobes (STAN) composed of bimetallic iron-gold nanoparticles. By manipulating the oxidation state of Fe on the particle surface through varying molar ratios of oleic acid and oleylamine ligands, we successfully achieve surface Fe enrichment. Under the application of a 9 T MRI system, the optimized STAN formulation, characterized by a surface Fe content of 60.1 at %, exhibits an impressive r1 value of 2.28 mM-1·s-1, along with a low r2/r1 ratio of 6.2. This exceptional performance allows for the clear visualization of hepatic tumors as small as 0.7 mm in diameter in vivo, highlighting the immense potential of STAN as a next-generation contrast agent for highly sensitive MR imaging.
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Affiliation(s)
- Zeyu Liang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, National Center for Translational Medicine, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shangzhi Xie
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Qiyue Wang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, National Center for Translational Medicine, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Bo Zhang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, National Center for Translational Medicine, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University, Shanghai 200240, China
- World Laureates Association (WLA) Laboratories, Shanghai 201203, China
| | - Lin Xiao
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Chenhan Wang
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xun Liu
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, National Center for Translational Medicine, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ying Chen
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Shengfei Yang
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hui Du
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, National Center for Translational Medicine, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yufan Qian
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Daishun Ling
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, National Center for Translational Medicine, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University, Shanghai 200240, China
- World Laureates Association (WLA) Laboratories, Shanghai 201203, China
| | - Lianming Wu
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fangyuan Li
- Songjiang Institute and Songjiang Hospital, Shanghai Key Laboratory of Emotions and Affective Disorders (LEAD), Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- World Laureates Association (WLA) Laboratories, Shanghai 201203, China
- Key Laboratory of Precision Diagnosis and Treatment for Hepatobiliary and Pancreatic Tumor of Zhejiang Province, Hangzhou 310009, China
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2
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Chatelier C, Atlan C, Dupraz M, Leake S, Li N, Schülli TU, Levi M, Rabkin E, Favre L, Labat S, Eymery J, Richard MI. Unveiling Core-Shell Structure Formation in a Ni 3Fe Nanoparticle with In Situ Multi-Bragg Coherent Diffraction Imaging. ACS NANO 2024; 18:13517-13527. [PMID: 38753950 DOI: 10.1021/acsnano.3c11534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Solid-state reactions play a key role in materials science. The evolution of the structure of a single 350 nm Ni3Fe nanoparticle, i.e., its morphology (facets) as well as its deformation field, has been followed by applying multireflection Bragg coherent diffraction imaging. Through this approach, we unveiled a demixing process that occurs at high temperatures (600 °C) under an Ar atmosphere. This process leads to the gradual emergence of a highly strained core-shell structure, distinguished by two distinct lattice parameters with a difference of 0.4%. Concurrently, this transformation causes the facets to vanish, ultimately yielding a rounded core-shell nanoparticle. This final structure comprises a Ni3Fe core surrounded by a 40 nm Ni-rich outer shell due to preferential iron oxidation. Providing in situ 3D imaging of the lattice parameters at the nanometer scale while varying the temperature, this study─with the support of atomistic simulations─not only showcases the power of in situ multireflection BCDI but also provides valuable insights into the mechanisms at work during a solid-state reaction characterized by a core-shell transition.
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Affiliation(s)
- Corentin Chatelier
- Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRX, 17 Rue des Martyrs, F-38000 Grenoble, France
- ESRF─The European Synchrotron, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Clément Atlan
- Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRX, 17 Rue des Martyrs, F-38000 Grenoble, France
- ESRF─The European Synchrotron, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Maxime Dupraz
- Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRX, 17 Rue des Martyrs, F-38000 Grenoble, France
- ESRF─The European Synchrotron, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Steven Leake
- ESRF─The European Synchrotron, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Ni Li
- Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRX, 17 Rue des Martyrs, F-38000 Grenoble, France
- ESRF─The European Synchrotron, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Tobias U Schülli
- ESRF─The European Synchrotron, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | - Mor Levi
- Department of Materials Science and Engineering, Technion-Israel Institute of Technology, 3200003 Haifa, Israel
| | - Eugen Rabkin
- Department of Materials Science and Engineering, Technion-Israel Institute of Technology, 3200003 Haifa, Israel
| | - Luc Favre
- Aix Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, F-13397 Marseille, France
| | - Stéphane Labat
- Aix Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, F-13397 Marseille, France
| | - Joël Eymery
- Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRX, 17 Rue des Martyrs, F-38000 Grenoble, France
| | - Marie-Ingrid Richard
- Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRX, 17 Rue des Martyrs, F-38000 Grenoble, France
- ESRF─The European Synchrotron, 71 Avenue des Martyrs, F-38000 Grenoble, France
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3
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Han Y, Wang L, Cao K, Zhou J, Zhu Y, Hou Y, Lu Y. In Situ TEM Characterization and Modulation for Phase Engineering of Nanomaterials. Chem Rev 2023; 123:14119-14184. [PMID: 38055201 DOI: 10.1021/acs.chemrev.3c00510] [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
Solid-state phase transformation is an intriguing phenomenon in crystalline or noncrystalline solids due to the distinct physical and chemical properties that can be obtained and modified by phase engineering. Compared to bulk solids, nanomaterials exhibit enhanced capability for phase engineering due to their small sizes and high surface-to-volume ratios, facilitating various emerging applications. To establish a comprehensive atomistic understanding of phase engineering, in situ transmission electron microscopy (TEM) techniques have emerged as powerful tools, providing unprecedented atomic-resolution imaging, multiple characterization and stimulation mechanisms, and real-time integrations with various external fields. In this Review, we present a comprehensive overview of recent advances in in situ TEM studies to characterize and modulate nanomaterials for phase transformations under different stimuli, including mechanical, thermal, electrical, environmental, optical, and magnetic factors. We briefly introduce crystalline structures and polymorphism and then summarize phase stability and phase transformation models. The advanced experimental setups of in situ techniques are outlined and the advantages of in situ TEM phase engineering are highlighted, as demonstrated via several representative examples. Besides, the distinctive properties that can be obtained from in situ phase engineering are presented. Finally, current challenges and future research opportunities, along with their potential applications, are suggested.
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Affiliation(s)
- Ying Han
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Liqiang Wang
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Ke Cao
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an, Shaanxi 710026, China
| | - Jingzhuo Zhou
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Yingxin Zhu
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Yuan Hou
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Yang Lu
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR 999077, China
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4
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Jeangros Q, Bugnet M, Epicier T, Frantz C, Diethelm S, Montinaro D, Tyukalova E, Pivak Y, Van Herle J, Hessler-Wyser A, Duchamp M. Operando analysis of a solid oxide fuel cell by environmental transmission electron microscopy. Nat Commun 2023; 14:7959. [PMID: 38042850 PMCID: PMC10693604 DOI: 10.1038/s41467-023-43683-4] [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: 10/27/2021] [Accepted: 11/16/2023] [Indexed: 12/04/2023] Open
Abstract
Correlating the microstructure of an energy conversion device to its performance is often a complex exercise, notably in solid oxide fuel cell research. Solid oxide fuel cells combine multiple materials and interfaces that evolve in time due to high operating temperatures and reactive atmospheres. We demonstrate here that operando environmental transmission electron microscopy can identify structure-property links in such devices. By contacting a cathode-electrolyte-anode cell to a heating and biasing microelectromechanical system in a single-chamber configuration, a direct correlation is found between the environmental conditions (oxygen and hydrogen partial pressures, temperature), the cell open circuit voltage, and the microstructural evolution of the fuel cell, down to the atomic scale. The results shed important insights into the impact of the anode oxidation state and its morphology on the cell electrical properties.
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Affiliation(s)
- Q Jeangros
- Photovoltaics and Thin-Film Electronics Laboratory (PV-Lab), École Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b, 2000, Neuchâtel, Switzerland.
- Centre Suisse d'Electronique et de Microtechnique (CSEM), Jaquet-Droz 1, 2002, Neuchâtel, Switzerland.
| | - M Bugnet
- Univ Lyon, CNRS, INSA-Lyon, UCBL, MATEIS, UMR 5510, 69621, Villeurbanne, France
| | - T Epicier
- Univ Lyon, CNRS, INSA-Lyon, UCBL, MATEIS, UMR 5510, 69621, Villeurbanne, France
- Univ Lyon, UCBL, IRCELYON, UMR CNRS 5256, F-69626, Villeurbanne, France
| | - C Frantz
- Group of Energy Materials (GEM), École Polytechnique Fédérale de Lausanne (EPFL), Rue de l'Industrie 17, 1951, Sion, Switzerland
| | - S Diethelm
- Group of Energy Materials (GEM), École Polytechnique Fédérale de Lausanne (EPFL), Rue de l'Industrie 17, 1951, Sion, Switzerland
| | - D Montinaro
- SolydEra S.p.A., 38017, Mezzolombardo, Italy
| | - E Tyukalova
- Laboratory for in situ & operando Electron Nanoscopy, School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, 63737, Singapore, Singapore
| | - Y Pivak
- DENSsolutions, Informaticalaan 12, 2628 ZD, Delft, The Netherlands
| | - J Van Herle
- Group of Energy Materials (GEM), École Polytechnique Fédérale de Lausanne (EPFL), Rue de l'Industrie 17, 1951, Sion, Switzerland
| | - A Hessler-Wyser
- Photovoltaics and Thin-Film Electronics Laboratory (PV-Lab), École Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b, 2000, Neuchâtel, Switzerland
| | - M Duchamp
- Laboratory for in situ & operando Electron Nanoscopy, School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, 63737, Singapore, Singapore.
- MajuLab, International Joint Research Unit UMI 3654, CNRS, Université Côte d'Azur, Sorbonne Université, National University of Singapore, Nanyang Technological University, Singapore, Singapore.
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Cao J, Xia J, Li X, Li Y, Liu P, Tian L, Qiao P, Liu C, Wang Y, Meng X. Defect-Mediated Growth of Crystallographic Shear Plane. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302365. [PMID: 37420328 DOI: 10.1002/smll.202302365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/17/2023] [Indexed: 07/09/2023]
Abstract
As representative extended planar defects, crystallographic shear (CS) planes, namely Wadsley defects, play an important role in modifying the physical and chemical properties of metal oxides. Although these special structures have been intensively investigated for high-rate anode materials and catalysts, it is still experimentally unclear how the CS planes form and propagate at the atomic scale. Here, the CS plane evolution in monoclinic WO3 is directly imaged via in situ scanning transmission electron microscope. It is found that the CS planes nucleate preferentially at the edge step defects and proceed by the cooperative migration of WO6 octahedrons along particular crystallographic orientations, passing through a series of intermediate states. The local reconstruction of atomic columns tends to form (102) CS planes featured with four edge-sharing octahedrons in preference to the (103) planes, which matches well with the theoretical calculations. Associated with the structure evolution, the sample undergoes a semiconductor-to-metal transition. In addition, the controlled growth of CS planes and V-shaped CS structures can be achieved by artificial defects for the first time. These findings enable an atomic-scale understanding of CS structure evolution dynamics.
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Affiliation(s)
- Jianyu Cao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Xia
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xuanze Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yuye Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Pei Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Lifeng Tian
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Peiyu Qiao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Chang Liu
- Institute for Computational Materials Science, Joint Center for Theoretical Physics, School of Physics and Electronics, Henan University, Kaifeng, 475004, China
| | - Yifan Wang
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiangmin Meng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
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6
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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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7
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Li Z, Xie Z, Zhang Y, Mu X, Xie J, Yin HJ, Zhang YW, Ophus C, Zhou J. Probing the atomically diffuse interfaces in Pd@Pt core-shell nanoparticles in three dimensions. Nat Commun 2023; 14:2934. [PMID: 37217475 DOI: 10.1038/s41467-023-38536-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 05/05/2023] [Indexed: 05/24/2023] Open
Abstract
Deciphering the three-dimensional atomic structure of solid-solid interfaces in core-shell nanomaterials is the key to understand their catalytical, optical and electronic properties. Here, we probe the three-dimensional atomic structures of palladium-platinum core-shell nanoparticles at the single-atom level using atomic resolution electron tomography. We quantify the rich structural variety of core-shell nanoparticles with heteroepitaxy in 3D at atomic resolution. Instead of forming an atomically-sharp boundary, the core-shell interface is found to be atomically diffuse with an average thickness of 4.2 Å, irrespective of the particle's morphology or crystallographic texture. The high concentration of Pd in the diffusive interface is highly related to the free Pd atoms dissolved from the Pd seeds, which is confirmed by atomic images of Pd and Pt single atoms and sub-nanometer clusters using cryogenic electron microscopy. These results advance our understanding of core-shell structures at the fundamental level, providing potential strategies into precise nanomaterial manipulation and chemical property regulation.
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Affiliation(s)
- Zezhou Li
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
- Center for Integrated Spectroscopy, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Zhiheng Xie
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
- Center for Integrated Spectroscopy, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Yao Zhang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
- Center for Integrated Spectroscopy, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Xilong Mu
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
- Center for Integrated Spectroscopy, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Jisheng Xie
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
- Center for Integrated Spectroscopy, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Hai-Jing Yin
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Ya-Wen Zhang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | - Colin Ophus
- National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Jihan Zhou
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China.
- Center for Integrated Spectroscopy, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China.
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8
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Zhang X, Zhou Y, Chen Y, Li M, Yu H, Li X. Advanced In Situ TEM Microchip with Excellent Temperature Uniformity and High Spatial Resolution. SENSORS (BASEL, SWITZERLAND) 2023; 23:s23094470. [PMID: 37177673 PMCID: PMC10181734 DOI: 10.3390/s23094470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 04/22/2023] [Accepted: 04/29/2023] [Indexed: 05/15/2023]
Abstract
Transmission electron microscopy (TEM) is a highly effective method for scientific research, providing comprehensive analysis and characterization. However, traditional TEM is limited to observing static material structures at room temperature within a high-vacuum environment. To address this limitation, a microchip was developed for in situ TEM characterization, enabling the real-time study of material structure evolution and chemical process mechanisms. This microchip, based on microelectromechanical System (MEMS) technology, is capable of introducing multi-physics stimulation and can be used in conjunction with TEM to investigate the dynamic changes of matter in gas and high-temperature environments. The microchip design ensures a high-temperature uniformity in the sample observation area, and a system of tests was established to verify its performance. Results show that the temperature uniformity of 10 real-time observation windows with a total area of up to 1130 μm2 exceeded 95%, and the spatial resolution reached the lattice level, even in a flowing atmosphere of 1 bar.
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Affiliation(s)
- Xuelin Zhang
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yufan Zhou
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ying Chen
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ming Li
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haitao Yu
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinxin Li
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
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9
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Huang TH, Jiang Y, Peng YH, Tseng YT, Yan C, Chien PC, Wang KY, Chen TY, Wang JH, Wang KW, Dai S. Unique (100) Surface Configuration Enables Promising Oxygen Reduction Performance for Pt 3Co Nanodendrite Catalysts. ACS APPLIED MATERIALS & INTERFACES 2023; 15:18217-18228. [PMID: 36976826 DOI: 10.1021/acsami.3c00968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Selective exposure of active surfaces of Pt-based electrocatalysts has been demonstrated as an effective strategy to improve Pt utilization and promote oxygen reduction reaction (ORR) activity in fuel cell application. However, challenges remain in stabilizing those active surface structures, which often suffer undesirable degradation and poor durability along with surface passivation, metal dissolution, and agglomeration of Pt-based electrocatalysts. To overcome the aforementioned obstacles, we here demonstrate the unique (100) surface configuration enabling active and stable ORR performance for bimetallic Pt3Co nanodendrite structures. Using elaborate microscopy and spectroscopy characterization, it is revealed that the Co atoms are preferentially segregated and oxidized at the Pt3Co(100) surface. In situ X-ray absorption spectroscopy (XAS) shows that such (100) surface configuration prevents the oxygen chemisorption and oxide formation on active Pt during the ORR process. Thus, the Pt3Co nanodendrite catalyst shows not only a high ORR mass activity of 730 mA/mg at 0.9 V vs RHE, which is 6.6-fold higher than that of the Pt/C, but also impressively high stability with 98% current retention after the acceleration degradation test in acid media for 5000 cycles, far exceeding the Pt or Pt3Co nanoparticles. Density functional theory (DFT) calculation also confirms the lateral and structural effects from the segregated Co and oxides on the Pt3Co(100) surface in reducing the catalyst oxophilicity and the free energy for the formation of an OH intermediate in the ORR.
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Affiliation(s)
- Tzu-Hsi Huang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
- Institute of Materials Science and Engineering, National Central University, Taoyuan 320, Taiwan
| | - Yongjun Jiang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yu-Hsin Peng
- Institute of Materials Science and Engineering, National Central University, Taoyuan 320, Taiwan
| | - Yao-Tien Tseng
- Institute of Materials Science and Engineering, National Central University, Taoyuan 320, Taiwan
| | - Che Yan
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Po-Cheng Chien
- Department of Chemistry, National Taiwan Normal University, Taipei 116, Taiwan
| | - Kung-Yu Wang
- Institute of Materials Science and Engineering, National Central University, Taoyuan 320, Taiwan
| | - Tsan-Yao Chen
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
- Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan
| | - Jeng-Han Wang
- Department of Chemistry, National Taiwan Normal University, Taipei 116, Taiwan
| | - Kuan-Wen Wang
- Institute of Materials Science and Engineering, National Central University, Taoyuan 320, Taiwan
| | - Sheng Dai
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
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10
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Guan J, Zhang J, Wang X, Zhang Z, Wang F. Synthesis of L1 0 -Iron Triad (Fe, Co, Ni)/Pt Intermetallic Electrocatalysts via a Phosphide-Induced Structural Phase Transition. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2207995. [PMID: 36417324 DOI: 10.1002/adma.202207995] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/10/2022] [Indexed: 06/16/2023]
Abstract
Structurally ordered L10 -iron triad (Fe, Co, Ni)/Pt with a M(iron triad)/Pt ratio ≈1:1 has drawn increasing attention in oxygen reduction reaction (ORR) electrocatalysis and fuel cell technologies by virtue of the high performance derived from their strong surface strain. However, the synthesis of intermetallic L10 -M(iron triad)Pt generally requires the accurate content control of the multicomponent and the sufficient thermal energy to overcome the kinetic barrier for atom diffusion. This work reports a synthesis of sub ≈5 nm L10 -intermetallic nanoparticles using phosphide intermediate-induced structural phase transition. Taking the L10 -CoPt intermetallic, for example, the formation of the L10 structure depends on the Co2 P intermediates can provide abundant P vacancies to accelerate the Pt diffusion into the orthorhombic Co-rich skeletons, instead of the traditional route of intermetallic from solid solution. L10 -CoPt prepared by this method has a high degree of ordering and shows the broad adaptability of various Pt-based electrocatalysts with different loading and states to improve their electrocatalytic performance. Additionally, the other L10 -M(iron triad)Pt intermetallics, i.e., L10 -NiPt and L10 -FePt, are also prepared through this phosphide-induced phase transition. The findings provide a promising strategy for designing other intermetallic materials alloy materials using a structural phase transition induced by a second phase.
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Affiliation(s)
- Jingyu Guan
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Jianqi Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Xinliang Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zhengping Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Feng Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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11
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Heizmann PA, Nguyen H, von Holst M, Fischbach A, Kostelec M, Gonzalez Lopez FJ, Bele M, Pavko L, Đukić T, Šala M, Ruiz-Zepeda F, Klose C, Gatalo M, Hodnik N, Vierrath S, Breitwieser M. Alternative and facile production pathway towards obtaining high surface area PtCo/C intermetallic catalysts for improved PEM fuel cell performance. RSC Adv 2023; 13:4601-4611. [PMID: 36760270 PMCID: PMC9900476 DOI: 10.1039/d2ra07780a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 01/30/2023] [Indexed: 02/09/2023] Open
Abstract
The design of catalysts with stable and finely dispersed platinum or platinum alloy nanoparticles on the carbon support is key in controlling the performance of proton exchange membrane (PEM) fuel cells. In the present work, an intermetallic PtCo/C catalyst is synthesized via double-passivation galvanic displacement. TEM and XRD confirm a significantly narrowed particle size distribution for the catalyst particles compared to commercial benchmark catalysts (Umicore PtCo/C). Only about 10% of the mass fraction of PtCo particles show a diameter larger than 8 nm, whereas this is up to or even more than 35% for the reference systems. This directly results in a considerable increase in electrochemically active surface area (96 m2 g-1 vs. >70 m2 g-1), which confirms the more efficient usage of precious catalyst metal in the novel catalyst. Single-cell tests validate this finding by improved PEM fuel cell performance. Reducing the cathode catalyst loading from 0.4 mg cm-2 to 0.25 mg cm-2 resulted in a power density drop at an application-relevant 0.7 V of only 4% for the novel catalyst, compared to the 10% and 20% for the commercial benchmarks reference catalysts.
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Affiliation(s)
- Philipp A. Heizmann
- Electrochemical Energy Systems, IMTEK – Department of Microsystems Engineering, University of FreiburgGeorges-Koehler-Allee 10379110 FreiburgGermany,Institute and FIT – Freiburg Center for Interactive Materials and Bioinspired Technologies, University of FreiburgGeorges-Köhler-Allee 10579110 FreiburgGermany
| | - Hien Nguyen
- Electrochemical Energy Systems, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,Hahn-Schickard Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Miriam von Holst
- Electrochemical Energy Systems, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,Hahn-Schickard Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Andreas Fischbach
- Electrochemical Energy Systems, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Mitja Kostelec
- Department of Materials Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia
| | - Francisco Javier Gonzalez Lopez
- Department of Materials Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia,ReCatalyst d.o.o.Hajdrihova ulica 19Ljubljana1000Slovenia
| | - Marjan Bele
- Department of Materials Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia
| | - Luka Pavko
- Department of Materials Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia
| | - Tina Đukić
- Department of Materials Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia
| | - Martin Šala
- Department of Analytical Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia
| | - Francisco Ruiz-Zepeda
- Department of Materials Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia
| | - Carolin Klose
- Electrochemical Energy Systems, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,Hahn-Schickard Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Matija Gatalo
- Department of Materials Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia,ReCatalyst d.o.o.Hajdrihova ulica 19Ljubljana1000Slovenia
| | - Nejc Hodnik
- Department of Materials Chemistry, National Institute of ChemistryHajdrihova ulica 191000 LjubljanaSlovenia
| | - Severin Vierrath
- Electrochemical Energy Systems, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,Institute and FIT - Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg Georges-Köhler-Allee 105 79110 Freiburg Germany.,Hahn-Schickard Georges-Koehler-Allee 103 79110 Freiburg Germany
| | - Matthias Breitwieser
- Electrochemical Energy Systems, IMTEK - Department of Microsystems Engineering, University of Freiburg Georges-Koehler-Allee 103 79110 Freiburg Germany .,Hahn-Schickard Georges-Koehler-Allee 103 79110 Freiburg Germany
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12
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Su L, Chen X, Xu L, Eldred T, Smith J, DellaRova C, Wang H, Gao W. Visualizing the Formation of High-Entropy Fluorite Oxides from an Amorphous Precursor at Atomic Resolution. ACS NANO 2022; 16:21397-21406. [PMID: 36454037 DOI: 10.1021/acsnano.2c09760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
High-entropy oxides (HEOs) have a large tuning space in composition and crystal structures, offering the possibility for improved material properties in applications including catalysis, energy storage, and thermal barrier coatings. Understanding the nucleation and growth mechanisms of HEOs at the atomic scale is critical to the design of their structure and functions but remains challenging. Herein, we visualize the entire formation process of a high-entropy fluorite oxide from a polymeric precursor using atomic resolution in situ gas-phase scanning transmission electron microscopy. The results show a four-stage formation mechanism, including nucleation during the oxidation of a polymeric precursor below 400 °C, diffusive grain growth below 900 °C, liquid-phase-assisted compositional homogenization under a "state of supercooling" at 900 °C, and entropy-driven recrystallization and stabilization at higher temperatures. The atomistic insights are critical for the rational synthesis of HEOs with controlled grain sizes and morphologies and thus the related properties.
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Affiliation(s)
- Lei Su
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Xi Chen
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695, United States
| | - Liang Xu
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Tim Eldred
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695, United States
- Analytical Instrumentation Facility, North Carolina State University, Raleigh, North Carolina27695, United States
| | - Jacob Smith
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695, United States
| | - Cierra DellaRova
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695, United States
| | - Hongjie Wang
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Wenpei Gao
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695, United States
- Analytical Instrumentation Facility, North Carolina State University, Raleigh, North Carolina27695, United States
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
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13
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Toyama R, Kawachi S, Yamaura JI, Fujita T, Murakami Y, Hosono H, Majima Y. Nanostructure-induced L1 0-ordering of twinned single-crystals in CoPt ferromagnetic nanowires. NANOSCALE ADVANCES 2022; 4:5270-5280. [PMID: 36540123 PMCID: PMC9724694 DOI: 10.1039/d2na00626j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 10/06/2022] [Indexed: 06/17/2023]
Abstract
L10-ordered ferromagnetic nanowires with large coercivity are essential for realizing next-generation spintronic devices. Ferromagnetic nanowires have been commonly fabricated by first L10-ordering of initially disordered ferromagnetic films by annealing and then etching them into nanowire structures using lithography. If the L10-ordered nanowires can be fabricated using only lithography and subsequent annealing, the etching process can be omitted, which leads to an improvement in the fabrication process for spintronic devices. However, when nanowires are subjected to annealing, they easily transform into droplets, which is well-known as Plateau-Rayleigh instability. Here, we propose a concept of "nanostructure-induced L10-ordering" of twinned single-crystals in CoPt ferromagnetic nanowires with a 30 nm scale ultrafine linewidth on Si/SiO2 substrates. The driving forces for nanostructure-induced L10-ordering during annealing are atomic surface diffusion and extremely large internal stress at ultrasmall 10 nm scale curvature radii of the nanowires. (Co/Pt)6 multilayer nanowires are fabricated by a lift-off process combining electron-beam lithography and electron-beam evaporation, followed by annealing. Cross-sectional scanning transmission electron microscope images and nano-beam electron diffraction patterns clearly indicate nanostructure-induced L10-ordering of twinned single-crystals in the CoPt ferromagnetic nanowires, which exhibit a large coercivity of 10 kOe for perpendicular, longitudinal, and transversal directions of the nanowires. Two-dimensional grazing incidence X-ray diffraction shows superlattice peaks with Debye-Scherrer ring shapes, which also supports the nanostructure-induced L10-ordering. The fabrication method for nanostructure-induced L10-ordered CoPt ferromagnetic nanowires with twinned single-crystals on Si/SiO2 substrates would be significant for future silicon-technology-compatible spintronic applications.
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Affiliation(s)
- Ryo Toyama
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology Yokohama Kanagawa 226-8503 Japan
| | - Shiro Kawachi
- Materials Research Center for Element Strategy, Tokyo Institute of Technology Yokohama Kanagawa 226-8503 Japan
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) Tsukuba Ibaraki 305-0801 Japan
- Graduate School of Science, University of Hyogo Kamigori Hyogo 678-1297 Japan
| | - Jun-Ichi Yamaura
- Materials Research Center for Element Strategy, Tokyo Institute of Technology Yokohama Kanagawa 226-8503 Japan
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) Tsukuba Ibaraki 305-0801 Japan
| | - Takeshi Fujita
- School of Environmental Science and Engineering, Kochi University of Technology Kami Kochi 782-8502 Japan
| | - Youichi Murakami
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) Tsukuba Ibaraki 305-0801 Japan
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology Yokohama Kanagawa 226-8503 Japan
| | - Yutaka Majima
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology Yokohama Kanagawa 226-8503 Japan
- Materials Research Center for Element Strategy, Tokyo Institute of Technology Yokohama Kanagawa 226-8503 Japan
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14
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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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15
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Shu C, Gan Z, Zhou J, Wang Z, Tang W. Highly Efficient Oxygen Reduction Reaction Fe-N-C Cathode in Long-durable Direct Glycol Fuel Cells. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-2223-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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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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17
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Engineering gold-platinum core-shell nanoparticles by self-limitation in solution. Commun Chem 2022; 5:71. [PMID: 36697905 PMCID: PMC9814372 DOI: 10.1038/s42004-022-00680-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 05/04/2022] [Indexed: 01/28/2023] Open
Abstract
Core-shell particles with thin noble metal shells represent an attractive material class with potential for various applications ranging from catalysis to biomedical and pharmaceutical applications to optical crystals. The synthesis of well-defined core-shell architectures remains, however, highly challenging. Here, we demonstrate that atomically-thin and homogeneous platinum shells can be grown via a colloidal synthesis method on a variety of gold nanostructures ranging from spherical nanoparticles to nanorods and nanocubes. The synthesis is based on the exchange of low binding citrate ligands on gold, the reduction of platinum and the subsequent kinetically hindered growth by carbon monoxide as strong binding ligand. The prerequisites for homogeneous growth are low core-binding ligands with moderate fast ligand exchange in solution, a mild reducing agent to mitigate homonucleation and a strong affinity of a second ligand system that can bind to the shell's surface. The simplicity of the described synthetic route can potentially be adapted to various other material libraries to obtain atomically smooth core-shell systems.
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18
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Shi W, Park AH, Kwon YU. Scalable synthesis of (Pd,Cu)@Pt core-shell catalyst with high ORR activity and durability. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Chen X, Zhang S, Li C, Liu Z, Sun X, Cheng S, Zakharov DN, Hwang S, Zhu Y, Fang J, Wang G, Zhou G. Composition-dependent ordering transformations in Pt-Fe nanoalloys. Proc Natl Acad Sci U S A 2022; 119:e2117899119. [PMID: 35344429 PMCID: PMC9168936 DOI: 10.1073/pnas.2117899119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 02/07/2022] [Indexed: 11/18/2022] Open
Abstract
SignificanceDynamically understanding the microscopic processes governing ordering transformations has rarely been attained. The situation becomes even more challenging for nanoscale alloys, where the significantly increased surface-area-to-volume ratio not only opens up a variety of additional freedoms to initiate an ordering transformation but also allows for kinetic interplay between the surface and bulk due to their close proximity. We provide direct evidence of the microscopic processes controlling the ordering transformation through the surface-bulk interplay in Pt-Fe nanoalloys and new features rendered by variations in alloy composition and chemical stimuli. These results provide a mechanistic detail of ordering transformation phenomena which are widely relevant to nanoalloys as chemical ordering occurs in most multicomponent materials under suitable environmental bias.
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Affiliation(s)
- Xiaobo Chen
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, NY 13902
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, NY 13902
| | - Siming Zhang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261
| | - Can Li
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902
| | - Zhijuan Liu
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973
| | - Xianhu Sun
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, NY 13902
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, NY 13902
| | - Shaobo Cheng
- Department of Condensed Matter Physics and Materials, Brookhaven National Laboratory, Upton, NY 11973
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Dmitri N. Zakharov
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973
| | - Sooyeon Hwang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973
| | - Yimei Zhu
- Department of Condensed Matter Physics and Materials, Brookhaven National Laboratory, Upton, NY 11973
| | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902
| | - Guofeng Wang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261
| | - Guangwen Zhou
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, NY 13902
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, NY 13902
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20
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PtCo-Based nanocatalyst for oxygen reduction reaction: Recent highlights on synthesis strategy and catalytic mechanism. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.03.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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21
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Structural evolution of Pt-based oxygen reduction reaction electrocatalysts. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63896-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Yu L, Wang J, Liu Z, Lin Y, Huang W, He Y. Imaging and Manipulating the Conversion from Single Cuprous Oxide Microparticles to Single Metal Hydroxide Microstructures. Inorg Chem 2021; 60:19421-19428. [PMID: 34822248 DOI: 10.1021/acs.inorgchem.1c03255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The template-assisted route is an effective avenue for the preparation of core-shell and hollow micromaterials. However, the conversion process is usually characterized by ex situ transmission electron microscopy, limiting the comprehensive understanding of the structure evolution. Here, we use dark-field microscopy (DFM) to visually image the chemical conversion process of Cu2O concave microcubes into metal hydroxide (MHs, M = Co, Ni, and Mn) microstructures at the single-particle level. The details of the conversion process such as early steps in the conversion reaction, intermediate states, and final states are successfully tracked in real time. The in situ DFM experiments clarify that the etching of Cu2O predates the generation of MHs, and the conversion reaction shows significant particle-to-particle variation. Meanwhile, the results also show that experimental parameters dominate the conversion of Cu2O concave microcubes, allowing for the precise manipulation of the reaction degree to obtain Cu2O@Co(OH)2 core-shell microstructures with different shell thicknesses and hollow Co(OH)2 microstructures. The present work offers a direct observation and manipulation of the conversion process of Cu2O microparticles, paving the way for rational design and preparation of various core-shell and hollow micromaterials.
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Affiliation(s)
- Ling Yu
- National Collaborative Innovation Center for Nuclear Waste and Environmental Safety, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Jingyu Wang
- National Collaborative Innovation Center for Nuclear Waste and Environmental Safety, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Zheng Liu
- National Collaborative Innovation Center for Nuclear Waste and Environmental Safety, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Ying Lin
- National Collaborative Innovation Center for Nuclear Waste and Environmental Safety, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Wei Huang
- National Collaborative Innovation Center for Nuclear Waste and Environmental Safety, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Yi He
- National Collaborative Innovation Center for Nuclear Waste and Environmental Safety, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China
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23
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Li X, He Y, Cheng S, Li B, Zeng Y, Xie Z, Meng Q, Ma L, Kisslinger K, Tong X, Hwang S, Yao S, Li C, Qiao Z, Shan C, Zhu Y, Xie J, Wang G, Wu G, Su D. Atomic Structure Evolution of Pt-Co Binary Catalysts: Single Metal Sites versus Intermetallic Nanocrystals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2106371. [PMID: 34605065 DOI: 10.1002/adma.202106371] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 09/04/2021] [Indexed: 06/13/2023]
Abstract
Due to their exceptional catalytic properties for the oxygen reduction reaction (ORR) and other crucial electrochemical reactions, PtCo intermetallic nanoparticle (NP) and single atomic (SA) Pt metal site catalysts have received considerable attention. However, their formation mechanisms at the atomic level during high-temperature annealing processes remain elusive. Here, the thermally driven structure evolution of Pt-Co binary catalyst systems is investigated using advanced in situ electron microscopy, including PtCo intermetallic alloys and single Pt/Co metal sites. The pre-doping of CoN4 sites in carbon supports and the initial Pt NP sizes play essential roles in forming either Pt3 Co intermetallics or single Pt/Co metal sites. Importantly, the initial Pt NP loadings against the carbon support are critical to whether alloying to L12 -ordered Pt3 Co NPs or atomizing to SA Pt sites at high temperatures. High Pt NP loadings (e.g., 20%) tend to lead to the formation of highly ordered Pt3 Co intermetallic NPs with excellent activity and enhanced stability toward the ORR. In contrast, at a relatively low Pt loading (<6 wt%), the formation of single Pt sites in the form of PtC3 N is thermodynamically favorable, in which a synergy between the PtC3 N and the CoN4 sites could enhance the catalytic activity for the ORR, but showing insufficient stability.
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Affiliation(s)
- Xing Li
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
- Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Yanghua He
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Shaobo Cheng
- Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Boyang Li
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Yachao Zeng
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Zhenhua Xie
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Qingping Meng
- Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Lu Ma
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Kim Kisslinger
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Xiao Tong
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Sooyeon Hwang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Siyu Yao
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Chenzhao Li
- Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University, Indianapolis, IN, 46202, USA
| | - Zhi Qiao
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Chongxin Shan
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Yimei Zhu
- Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Jian Xie
- Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University, Indianapolis, IN, 46202, USA
| | - Guofeng Wang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Gang Wu
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Dong Su
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
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24
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Lipińska W, Grochowska K, Ryl J, Karczewski J, Siuzdak K. Influence of Annealing Atmospheres on Photoelectrochemical Activity of TiO 2 Nanotubes Modified with AuCu Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2021; 13:52967-52977. [PMID: 34704439 DOI: 10.1021/acsami.1c16271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this article, we studied the annealing process of AuCu layers deposited on TiO2 nanotubes (NTs) conducted in various atmospheres such as air, vacuum, argon, and hydrogen in order to obtain materials active in both visible and UV-vis ranges. The material fabrication route covers the electrochemical anodization of a Ti plate, followed by thin AuCu film magnetron sputtering and further thermal treatment. Scanning electron microscopy images confirmed the presence of spherical nanoparticles (NPs) formed on the external and internal walls of NTs. The optical and structural properties were characterized using UV-vis, X-ray diffraction, and X-ray photoelectron spectroscopies. It was proved that thermal processing under the argon atmosphere leads to the formation of a CuAuTi alloy in contrast to materials fabricated in air, vacuum, and hydrogen. The electrochemical measurements were carried out in NaOH using cyclic voltammetry, linear voltammetry, and chronoamperometry. The highest photoactivity was achieved for materials thermally treated in the argon atmosphere. In addition, the Mott-Schottky analysis was performed for bare TiO2 NTs and TiO2 NTs modified with gold copper NPs indicating a shift in the flatband potential. Overall, thermal processing resulted in changes in optical and structural properties as well as electrochemical and photoelectrochemical activities.
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Affiliation(s)
- Wiktoria Lipińska
- Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences, Fiszera 14 Street, 80-231 Gdańsk, Poland
| | - Katarzyna Grochowska
- Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences, Fiszera 14 Street, 80-231 Gdańsk, Poland
| | - Jacek Ryl
- Institute of Nanotechnology and Materials Engineering, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
- Advanced Materials Center, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
| | - Jakub Karczewski
- Institute of Nanotechnology and Materials Engineering, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
- Advanced Materials Center, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
| | - Katarzyna Siuzdak
- Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences, Fiszera 14 Street, 80-231 Gdańsk, Poland
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25
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Pino N, Quinchia J, Gómez S, Espinal JF, Montoya A, López D. Selective heterogeneous hydrodeoxygenation of acetophenone over monometallic and bimetallic Pt-Co catalyst. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2021; 379:20200346. [PMID: 34510929 DOI: 10.1098/rsta.2020.0346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/26/2021] [Indexed: 06/13/2023]
Abstract
The hydrodeoxygenation (HDO) of acetophenone was evaluated in liquid phase and gas phase over monometallic Pt/SiO2, Co/SiO2 and bimetallic Pt-Co/SiO2 catalysts. The influence of reaction time and loading of the catalyst were analysed by following the conversion and products selectivity. Phenylethanol, cyclohexylethanone and cyclohexylethanol are the main products of reaction using the Pt/SiO2 catalyst. By contrast, ethylbenzene and phenylethanol are the only products formed on the Co/SiO2 and Pt-Co/SiO2 catalysts. The bimetallic catalyst is more stable as a function of time and more active towards the HDO process than the monometallic systems. The presence of an organic solvent showed only minor changes in product yields with no effect on the product speciation. Periodic density functional theory analysis indicates a stronger interaction between the carbonyl group of acetophenone with Co than with Pt sites of the mono and bimetallic systems, indicating a key activity of oxophilic sites towards improved selectivity to deoxygenated products. This article is part of the theme issue 'Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 2)'.
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Affiliation(s)
- Natalia Pino
- Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Jennifer Quinchia
- Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Santiago Gómez
- Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Juan F Espinal
- Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Alejandro Montoya
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Diana López
- Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
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26
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Kim J, Choi H, Kim D, Park JY. Operando Surface Studies on Metal-Oxide Interfaces of Bimetal and Mixed Catalysts. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02340] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Jeongjin Kim
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Hanseul Choi
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Daeho Kim
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jeong Young Park
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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27
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Li Z, Feng Y, Lang X, Kang W, Mao J, Shen G, Liu H, Dong C, Wang W, Du X. Fine regulation of electron transfer in Ag@Co 3O 4 nanoparticles for boosting the oxygen evolution reaction. Chem Commun (Camb) 2021; 57:6284-6287. [PMID: 34075972 DOI: 10.1039/d1cc02189c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, a core-shell structure (Ag@Co3O4) was constructed to modify the valence state of cobalt cations precisely by continuously adjusting the shell thickness. There exists a volcano relationship between the valence state of Co sites and OER activity, and the lowest overpotential (212 mV@10 mA cm-2) has been obtained.
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Affiliation(s)
- Zhe Li
- Institute of New Energy Materials, School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, P. R. China.
| | - Yi Feng
- Institute of New Energy Materials, School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, P. R. China.
| | - Xiuyao Lang
- Department of Electronics, Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin, 300071, P. R. China.
| | - Wenjing Kang
- Institute of New Energy Materials, School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, P. R. China.
| | - Jing Mao
- Institute of New Energy Materials, School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, P. R. China.
| | - Gurong Shen
- Institute of New Energy Materials, School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, P. R. China.
| | - Hui Liu
- Institute of New Energy Materials, School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, P. R. China.
| | - Cunku Dong
- Institute of New Energy Materials, School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, P. R. China.
| | - Weichao Wang
- Department of Electronics, Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin, 300071, P. R. China.
| | - Xiwen Du
- Institute of New Energy Materials, School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, P. R. China. and Longyan University, Longyan, 364012, P. R. China
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28
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Meng J, Zhu B, Gao Y. Structure reconstruction of metal/alloy in reaction conditions: a volcano curve? Faraday Discuss 2021; 229:62-74. [PMID: 33634798 DOI: 10.1039/c9fd00128j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Recent in situ works have shown extensive evidence of the dramatic and reversible structure reconstructions of metal and alloy materials in reaction conditions. The reconstructions are of primary interest because they could lead to alternative catalytic mechanisms during real reactions. However, how the catalyst structure evolves under the pressures relevant to industrial applications (>1 atm) is so far unexplored. In our recent works, we have developed multiscale theoretical models to give reliable and precise predictions of the equilibrium shapes of metal nanoparticles and of the segregation properties of alloy surfaces at a given temperature and gas pressure. The theoretical predictions have been successfully used in interoperations of various in situ experimental observations. In this work, we applied these methods to study the detailed structural information of metal NPs and of bimetallic alloys at the temperature from 300 to 1000 K and the gas pressure from 10 to 107 Pa. The results show, in some cases, both the gas-induced shape change and the gas-induced segregation change are maximized when the gas adsorption is 'just right'. The fraction of the low-coordinated sites of the metal NP shows a volcano-like curve with pressure at a constant temperature. A similar volcano shape could also be found in the plot of the environmental segregation energy as functions of temperature and pressure. The similar gas effects at low pressure and at high pressure indicate the structural information obtained in laboratory environments (<1 atm) could be of use to understanding the catalysts structure reconstruction in industrial conditions (>1 atm).
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Affiliation(s)
- Jun Meng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Beien Zhu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China and Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
| | - Yi Gao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China and Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
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29
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Wang J, Chang X, Chen S, Sun G, Zhou X, Vovk E, Yang Y, Deng W, Zhao ZJ, Mu R, Pei C, Gong J. On the Role of Sn Segregation of Pt-Sn Catalysts for Propane Dehydrogenation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00639] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jieli Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Xin Chang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Sai Chen
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Guodong Sun
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Xiaohong Zhou
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Evgeny Vovk
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yong Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Wanyu Deng
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Zhi-Jian Zhao
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Rentao Mu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Chunlei Pei
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
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30
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Li F, Zong Y, Ma Y, Wang M, Shang W, Tao P, Song C, Deng T, Zhu H, Wu J. Atomistic Imaging of Competition between Surface Diffusion and Phase Transition during the Intermetallic Formation of Faceted Particles. ACS NANO 2021; 15:5284-5293. [PMID: 33606506 DOI: 10.1021/acsnano.0c10775] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
To explore the ordering mechanism of facet alloy nanocrystals with randomly distributed atoms, we investigate kinetic and thermodynamic behaviors of the ordering phase transition from face-centered cubic Pt3Co nanocrystals to L12-Pt3Co intermetallic nanocrystals. It is observed that the ordering occurs from the surface and then gradually into the interior in a layer-by-layer mode, involving the competition between two kinds of phase transition modes: long-range surface diffusion-induced phase transition (SDIPT) and short-range reconstruction-induced body phase transition (RIBPT). The density functional theory calculations demonstrate that the surface status acts as a pivotal part in the thermodynamics and kinetics of the nanoscale ordering transition. With the development of the controllable heating process, both SDIPT and RIBPT modes can be manipulated as well as the morphology of the final product. This in situ work lays the foundations for potentially realizing shape-controlled intermetallic nanostructures by utilizing the thermal annealing method and makes preparations for the rational design of the surface and near-surface atomic configurations at the atomic scale.
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Affiliation(s)
- Fan Li
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yuan Zong
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yanling Ma
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Mingxu Wang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Peng Tao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chengyi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hong Zhu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- University of Michigan - Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
- Materials Genome Initiative Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jianbo Wu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai 200240, China
- Materials Genome Initiative Center, Shanghai Jiao Tong University, Shanghai 200240, China
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31
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Kuna E, Mrdenovic D, Jönsson-Niedziółka M, Pieta P, Pieta IS. Bimetallic nanocatalysts supported on graphitic carbon nitride for sustainable energy development: the shape-structure-activity relation. NANOSCALE ADVANCES 2021; 3:1342-1351. [PMID: 36132874 PMCID: PMC9416898 DOI: 10.1039/d0na01063d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 04/06/2021] [Accepted: 01/19/2021] [Indexed: 06/16/2023]
Abstract
The catalytic performance of metal nanoparticles (NPs), including activity, selectivity, and durability, depends on their shape and structure at the molecular level. Consequently, metal NPs of different size and shape, e.g., nanobelts, nanocubes, nanoflakes, and nanowires, demonstrate different reactivity and provide different reaction rates depending on the facet exposed. In this context, the present review aims to summarize the shape-structure-activity relation of metallic nanocatalysts. Moreover, keeping in mind that the application of noble metal catalysts is expensive, we would like to draw the reader's attention to bimetallic nanocatalysts supported on graphitic carbon nitride. One of the advantages of these systems is the possibility to minimize the use of noble metals by introducing another metal either to the parent NPs and/or modifying the support materials. The development and optimization of bimetallic nanocatalysts might provide the new class of materials with superior, tunable performance, thermal stability and reduced costs compared to presently available commercial catalysts. Therefore, further application of these bimetallic composites for sustainable development in energy, green chemicals/fuels and environmental protection will be discussed.
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Affiliation(s)
- Ewelina Kuna
- Institute of Physical Chemistry Polish Academy of Sciences 01-224 Warsaw Poland
| | - Dusan Mrdenovic
- Institute of Physical Chemistry Polish Academy of Sciences 01-224 Warsaw Poland
| | | | - Piotr Pieta
- Institute of Physical Chemistry Polish Academy of Sciences 01-224 Warsaw Poland
| | - Izabela S Pieta
- Institute of Physical Chemistry Polish Academy of Sciences 01-224 Warsaw Poland
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32
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Yang Y, Tan C, Yang Y, Zhang L, Zhang B, Wu K, Zhao S. Pt
3
Co@Pt Core@shell Nanoparticles as Efficient Oxygen Reduction Electrocatalysts in Direct Methanol Fuel Cell. ChemCatChem 2021. [DOI: 10.1002/cctc.202001868] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yongchao Yang
- School of Chemical and Biomolecular Engineering The University of Sydney ydney, New South Wales 2006 Australia
| | - Chunhui Tan
- School of Chemical and Biomolecular Engineering The University of Sydney ydney, New South Wales 2006 Australia
| | - Yuwei Yang
- School of Chemical and Biomolecular Engineering The University of Sydney ydney, New South Wales 2006 Australia
| | - Lei Zhang
- Institute for Superconducting and Electronic Materials Australian Institute of Innovative Materials University of Wollongong North Wollongong, New South Wales 2500 Australia
| | - Bin‐Wei Zhang
- Institute for Superconducting and Electronic Materials Australian Institute of Innovative Materials University of Wollongong North Wollongong, New South Wales 2500 Australia
| | - Kuang‐Hsu Wu
- School of Chemical Engineering The University of New South Wales Sydney, New South Wales 2052 Australia
| | - Shenlong Zhao
- School of Chemical and Biomolecular Engineering The University of Sydney ydney, New South Wales 2006 Australia
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33
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Guntern YT, Okatenko V, Pankhurst J, Varandili SB, Iyengar P, Koolen C, Stoian D, Vavra J, Buonsanti R. Colloidal Nanocrystals as Electrocatalysts with Tunable Activity and Selectivity. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04403] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yannick T. Guntern
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
| | - Valery Okatenko
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
| | - James Pankhurst
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
| | - Seyedeh Behnaz Varandili
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
| | - Pranit Iyengar
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
| | - Cedric Koolen
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
| | - Dragos Stoian
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
| | - Jan Vavra
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
| | - Raffaella Buonsanti
- Laboratory of Nanochemistry for Energy (LNCE), Department of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
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34
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Yang Y, Xiong Y, Zeng R, Lu X, Krumov M, Huang X, Xu W, Wang H, DiSalvo FJ, Brock JD, Muller DA, Abruña HD. Operando Methods in Electrocatalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04789] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yao Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Yin Xiong
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Rui Zeng
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Xinyao Lu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Mihail Krumov
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Xin Huang
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
- Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, New York 14853, United States
| | - Weixuan Xu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Hongsen Wang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Francis J. DiSalvo
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Joel. D. Brock
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
- Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, New York 14853, United States
| | - David A. Muller
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States
| | - Héctor D. Abruña
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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35
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36
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Ribeiro EL, Davis EM, Mokhtarnejad M, Hu S, Mukherjee D, Khomami B. MOF-derived PtCo/Co 3O 4 nanocomposites in carbonaceous matrices as high-performance ORR electrocatalysts synthesized via laser ablation techniques. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02099k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
ZIF-67-derived carbon-based bimetallic nanocomposites with reduced Pt-loading via laser ablation synthesis in solution (LASiS) as a superior electrocatalyst for oxygen reduction reaction (ORR).
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Affiliation(s)
- Erick L. Ribeiro
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Material Research and Innovation Laboratory (MRAIL)
| | - Elijah M. Davis
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Nano-BioMaterials Laboratory for Energy, Energetics & Environment (nbml-E3)
| | - Mahshid Mokhtarnejad
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Material Research and Innovation Laboratory (MRAIL)
| | - Sheng Hu
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Nano-BioMaterials Laboratory for Energy, Energetics & Environment (nbml-E3)
| | - Dibyendu Mukherjee
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Material Research and Innovation Laboratory (MRAIL)
| | - Bamin Khomami
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Material Research and Innovation Laboratory (MRAIL)
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37
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Zheng Y, Wang X, Kong Y, Ma Y. Two-dimensional multimetallic alloy nanocrystals: recent progress and challenges. CrystEngComm 2021. [DOI: 10.1039/d1ce00975c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this highlight article, the recent progress on the preparation and application of multimetallic alloy nanocrystals with 2D nanostructures is systematically reviewed, as well as perspectives on future challenges and opportunities.
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Affiliation(s)
- Yiqun Zheng
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, P. R. China
| | - Xiping Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China
| | - Yuhan Kong
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, P. R. China
| | - Yanyun Ma
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China
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38
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Tang M, Yuan W, Ou Y, Li G, You R, Li S, Yang H, Zhang Z, Wang Y. Recent Progresses on Structural Reconstruction of Nanosized Metal Catalysts via Controlled-Atmosphere Transmission Electron Microscopy: A Review. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03335] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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
| | - Wentao Yuan
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yang Ou
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Guanxing Li
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ruiyang You
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Songda Li
- 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
| | - Ze Zhang
- 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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39
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Boniface M, Plodinec M, Schlögl R, Lunkenbein T. Quo Vadis Micro-Electro-Mechanical Systems for the Study of Heterogeneous Catalysts Inside the Electron Microscope? Top Catal 2020. [DOI: 10.1007/s11244-020-01398-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
AbstractDuring the last decade, modern micro-electro-mechanical systems (MEMS) technology has been used to create cells that can act as catalytic nanoreactors and fit into the sample holders of transmission electron microscopes. These nanoreactors can maintain atmospheric or higher pressures inside the cells as they seal gases or liquids from the vacuum of the TEM column and can reach temperatures exceeding 1000 °C. This has led to a paradigm shift in electron microscopy, which facilitates the local characterization of structural and morphological changes of solid catalysts under working conditions. In this review, we outline the development of state-of-the-art nanoreactor setups that are commercially available and are currently applied to study catalytic reactions in situ or operando in gaseous or liquid environments. We also discuss challenges that are associated with the use of environmental cells. In catalysis studies, one of the major challenge is the interpretation of the results while considering the discrepancies in kinetics between MEMS based gas cells and fixed bed reactors, the interactions of the electron beam with the sample, as well as support effects. Finally, we critically analyze the general role of MEMS based nanoreactors in electron microscopy and catalysis communities and present possible future directions.
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40
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Luo Q, Wang S, Zhu Y, Tang S, Du Y. Structurally ordered Pt 3Co for oxygen reduction reaction prepared using polyvinylpyrrolidone as auxiliary dispersant. NANOTECHNOLOGY 2020; 31:455605. [PMID: 32746441 DOI: 10.1088/1361-6528/ababc9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Structurally ordered Pt3Co/C nanoparticles (NPs) were obtained via a spray paint drying method with an annealing treatment. The addition of a suitable dose of polyvinylpyrrolidone resulted in a narrow size distribution of the Pt3Co/C-600-1 NPs, an average particle size of ca. 4.6 nm, which may be due to the enhanced dispersion in aqueous solution resulting from the carbon support. The sample denoted as Pt3Co/C-600-1 NPs performs high activity for oxygen reduction reaction with the mass activity (MA) ca. 3 times higher than that of a commercial Pt/C catalyst at 0.9 V. Accelerated durability tests (ADTs) showed that Pt3Co/C-600-1 NPs exhibit superior stability with a minimal loss of 17.5% in MA at 0.9 V after 5000 cycles, while Pt/C catalysts show loss of 44.4%. This simple two-step strategy provides an effective way to prepare Pt-based catalysts for industrial application.
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Affiliation(s)
- Qingyu Luo
- Jiangsu Key Laboratory for Nanotechnology, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
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41
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Zhao J, Chen B, Wang F. Shedding Light on the Role of Misfit Strain in Controlling Core-Shell Nanocrystals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2004142. [PMID: 33051904 DOI: 10.1002/adma.202004142] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/21/2020] [Indexed: 05/17/2023]
Abstract
Heteroepitaxial modification of nanomaterials has become a powerful means to create novel functionalities for various applications. One of the most elementary factors in heteroepitaxial nanostructures is the misfit strain arising from mismatched lattices of the constituent parts. Misfit strain not only dictates epitaxy kinetics for diversifying nanocrystal morphologies but also provides rational control over materials properties. In recent years, advances in chemical synthesis along with the rapid development of electron microscopy and X-ray diffraction techniques have enabled a substantial understanding of strain-related processes, which offers theoretical foundation and experimental guidance for researchers to refine heteroepitaxial nanostructures and their properties. Herein, recent investigations on heterogeneous core-shell nanocrystals containing misfit strains are summarized, with a focus on the mechanistic understanding of strain and strain-induced effects such as tuning the epitaxial habit, modulating the optical emission, and enhancing the catalytic activity and magnetic coercivity.
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Affiliation(s)
- Jianxiong Zhao
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Bing Chen
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Feng Wang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
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42
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Chemical kinetics for operando electron microscopy of catalysts: 3D modeling of gas and temperature distributions during catalytic reactions. Ultramicroscopy 2020; 218:113080. [PMID: 32795882 DOI: 10.1016/j.ultramic.2020.113080] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 07/14/2020] [Accepted: 07/20/2020] [Indexed: 11/21/2022]
Abstract
In situ environmental transmission electron microscopy (ETEM) is a powerful tool for observing structural modifications taking place in heterogeneous catalysts under reaction conditions. However, to strengthen the link between catalyst structure and functionality, an operando measurement must be performed in which reaction kinetics and catalyst structure are simultaneously determined. To determine chemical kinetics for gas-phase catalysis, it is necessary to develop a reliable chemical engineering model to describe catalysis as well as heat and mass transport processes within the ETEM cell. Here, we establish a finite element model to determine the gas and temperature profiles during catalysis in an open-cell operando ETEM experiment. The model is applied to a SiO2-supported Ru catalyst performing CO oxidation. Good agreement is achieved between simulated compositions and those measured experimentally across a temperature range of 25 - 350 °C. In general, for lower conversions, the simulations show that the temperature and gas are relatively homogeneous within the hot zone of the TEM holder where the catalyst is located. The uniformity of gas and temperature indicates that the ETEM reactor system behavior approximates that of a continuously stirred tank reactor (CSTR). The large degree of gas-phase uniformity also allows one to estimate the catalytic conversion of reactants in the cell to within 10% using electron energy-loss spectroscopy. Moreover, the findings indicate that for reactant conversions below 35%, one can reliably evaluate the steady-state reaction rate of catalyst nanoparticles that are imaged on the TEM grid.
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43
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Zhang X, Zhang X, Yuan B, Liang C, Yu Y. Atomic-scale study of nanocatalysts by aberration-corrected electron microscopy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:413004. [PMID: 32666936 DOI: 10.1088/1361-648x/ab977c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 05/28/2020] [Indexed: 06/11/2023]
Abstract
Aberration-corrected electron microscopy (AC-EM) including transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) has become one of the most powerful technologies in the studies of nanocatalysts. With the current spatial resolution of sub-0.5 Å and energy resolution of 10 meV, AC-EM can quantificationally articulate the connection between catalytic properties and atomic configurations of nanocatalysts. However, the restricted irradiation sensitive characteristics of specimens pose an obstacle to solve their intrinsic structure. Low-dose imaging should be applied to overcome this problem. In addition, the choice of appropriate imaging method is also crucial to tackle specific structural problems of nanocatalysts. On the basis of careful management of electron dose and selection of suitable imaging method,in situgas and liquid S/TEM are able to reveal the structure evolution of nanocatalysts in real-time. Further combination with residual gas analysis would deepen the understanding of the catalytic reaction.
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Affiliation(s)
- Xun Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Xiuli Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Biao Yuan
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Chao Liang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Yi Yu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
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44
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Abstract
For decades, differentially pumped environmental transmission electron microscopy has been a powerful tool to study dynamic structural evolution of catalysts under a gaseous environment. With the advancement of micro-electromechanical system-based technologies, windowed gas cell became increasingly popular due to its ability to achieve high pressure and its compatibility to a wide range of microscopes with minimal modification. This enables a series of imaging and analytical technologies such as atomic resolution imaging, spectroscopy, and operando, revealing details that were unprecedented before. By reviewing some of the recent work, we demonstrate that the windowed gas cell has the unique ability to solve complicated catalysis problems. We also discuss what technical difficulties need to be addressed and provide an outlook for the future of in situ environmental transmission electron microscopy (TEM) technologies and their application to the field of catalysis development.
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45
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Huang R, Bi JX, Li L, Wen YH. Basin Hopping Genetic Algorithm for Global Optimization of PtCo Clusters. J Chem Inf Model 2020; 60:2219-2228. [PMID: 32203652 DOI: 10.1021/acs.jcim.0c00130] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In general, searching the lowest-energy structures is considerably more time-consuming for bimetallic clusters than for monometallic ones because of the presence of an increasing number of homotops and geometrical isomers. In this article, a basin hopping genetic algorithm (BHGA), in which the genetic algorithm is implanted into the basin hopping (BH) method, is proposed to search the lowest-energy structures of 13-, 38-, and 55-atom PtCo bimetallic clusters. The results reveal that the proposed BHGA, as compared with the standard BH method, can markedly improve the convergent speed for global optimization and the possibility for finding the global minima on the potential energy surface. Meanwhile, referencing the monometallic structures in initializations may further raise the searching efficiency. For all the optimized clusters, both the excess energy and the second difference of the energy are calculated to examine their relative stabilities at different atomic ratios. The bond order parameter, the similarity function, and the shape factor are also adopted to quantitatively characterize the cluster structures. The results indicate that the 13- and the 55-atom systems tend to be icosahedral despite different degrees of lattice distortions. In contrast, for the 38-atom system, Pt10Co28, Pt11Co27, Pt17Co21, Pt19Co19, Pt20Co18, and Pt30Co8 tend to be disordered, while Pt21Co17 presents a defected face-centered cubic (fcc) structure, and the remaining clusters are perfect fcc. The methodology and results of this work have referential significance to the exploration of other alloy clusters.
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Affiliation(s)
- Rao Huang
- Department of Physics, Xiamen University, Xiamen 361005, China
| | - Jian-Xiang Bi
- Department of Physics, Xiamen University, Xiamen 361005, China
| | - Lei Li
- Department of Physics, Xiamen University, Xiamen 361005, China
| | - Yu-Hua Wen
- Department of Physics, Xiamen University, Xiamen 361005, China
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46
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Luo L, Chen S, Xu Q, He Y, Dong Z, Zhang L, Zhu J, Du Y, Yang B, Wang C. Dynamic Atom Clusters on AuCu Nanoparticle Surface during CO Oxidation. J Am Chem Soc 2020; 142:4022-4027. [PMID: 32017551 DOI: 10.1021/jacs.9b13901] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Supported alloy nanoparticles are prevailing alternative low-cost catalysts for both heterogeneous and electrochemical catalytic processes. Gas molecules selectively interacting with one metal element induces a dynamic structural change of alloy nanoparticles under reaction conditions and largely controls their catalytic properties. However, such a multicomponent dynamic-interaction-controlled evolution, both structural and chemical, remains far from clear. Herein, by using state-of-the-art environmental TEM, we directly visualize, in situ at the atomic scale, the evolution of a AuCu alloy nanoparticle supported on CeO2 during CO oxidation. We find that gas molecules can "free" metal atoms on the (010) surface and form highly mobile atom clusters. Remarkably, we discover that CO exposure induces Au segregation and activation on the nanoparticle surface, while O2 exposure leads to the segregation and oxidation of Cu on the particle surface. The as-formed Cu2O/AuCu interface may facilitate CO-O interaction corroborated by DFT calculations. These findings provide insights into the atomistic mechanisms on alloy nanoparticles during catalytic CO oxidation reaction and to a broad scope of rational design of alloy nanoparticle catalysts.
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Affiliation(s)
- Langli Luo
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry , Tianjin University , 92 Weijin Road , Tianjin 300072 , China
| | - Shuyue Chen
- School of Physical Science and Technology , Shanghai Tech University , 393 Middle Huaxia Road , Shanghai 201210 , China
| | - Qian Xu
- National Synchrotron Radiation Laboratory and Collaborative Innovation Center for Suzhou Nano Science and Technology , University of Science and Technology of China , Hefei , Anhui 230029 , China
| | - Yang He
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , 902 Battelle Boulevard , Richland , Washington 99352 , United States
| | - Zejian Dong
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry , Tianjin University , 92 Weijin Road , Tianjin 300072 , China
| | - Lifeng Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry , Tianjin University , 92 Weijin Road , Tianjin 300072 , China
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory and Collaborative Innovation Center for Suzhou Nano Science and Technology , University of Science and Technology of China , Hefei , Anhui 230029 , China
| | - Yingge Du
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Bo Yang
- School of Physical Science and Technology , Shanghai Tech University , 393 Middle Huaxia Road , Shanghai 201210 , China
| | - Chongmin Wang
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , 902 Battelle Boulevard , Richland , Washington 99352 , United States
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47
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Chen HS, Benedetti TM, Gonçales VR, Bedford NM, Scott RWJ, Webster RF, Cheong S, Gooding JJ, Tilley RD. Preserving the Exposed Facets of Pt 3Sn Intermetallic Nanocubes During an Order to Disorder Transition Allows the Elucidation of the Effect of the Degree of Alloy Ordering on Electrocatalysis. J Am Chem Soc 2020; 142:3231-3239. [PMID: 31990182 DOI: 10.1021/jacs.9b13313] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Controlling which facets are exposed in nanocrystals is crucial to understanding different activity between ordered and disordered alloy electrocatalysts. We modify the degree of ordering of Pt3Sn nanocubes, while maintaining the shape and size, to enable a direct evaluation of the effect of the order on ORR catalytic activity. We demonstrate a 2.3-fold enhancement in specific activity by 60- and 30%-ordered Pt3Sn nanocubes compared to 95%-ordered. This was shown to be likely due to surface vacancies in the less-ordered particles. The greater order, however, results in higher stability of the electrocatalyst, with the more disordered nanoparticles showing the dissolution of tin and platinum species during electrocatalysis.
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Affiliation(s)
| | | | | | | | - Robert W J Scott
- Department of Chemistry , University of Saskatchewan , 110 Science Place , Saskatoon , Saskatchewan S7N 5C9 , Canada
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48
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Zhao Z, Xu H, Feng Z, Zhang Y, Cui M, Cao D, Cheng D. Design of High-Performance Co-Based Alloy Nanocatalysts for the Oxygen Reduction Reaction. Chemistry 2019; 26:4128-4135. [PMID: 31797431 DOI: 10.1002/chem.201904431] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/25/2019] [Indexed: 12/19/2022]
Abstract
Co-based nanoalloys show potential applications as nanocatalysts for the oxygen reduction reaction (ORR), but improving their activity is still a great challenge. In this paper, a strategy is proposed to design efficient Co-M (M=Au, Ag, Pd, Pt, Ir, and Rh) nanoalloys as ORR catalysts by using density functional theory (DFT) calculations. Through the Sabatier analysis, the overpotential as a function of ΔGOH * is identified as a quantitative descriptor for analyzing the effect of dopants and atomic structures on the activity of the Co-based nanoalloys. By adopting the suitable dopants and atomic structures, ΔGOH * accompanied by overpotential could be adjusted to the optimal range to enhance the activity of the Co-based nanoalloys. With this strategy, the core-shell structured Ag42 Co13 nanoalloy is predicted to have the highest catalytic activity for ORR among these Co-based nanoalloys. To give a deeper insight into the properties of Ag-Co nanoalloys, the structure, thermal stability, and reaction mechanism of Ag-Co nanoalloys with different compositions are also studied by using molecular simulations and DFT calculations. It is found that core-shell Ag42 Co13 exhibits the highest structural and thermal stability among these Ag-Co nanoalloys. In addition, the core-shell Ag42 Co13 shows the lowest ORR reaction energy barriers among these Ag-Co nanoalloys. It is expected that this kind of strategy could provide a viable way to design highly efficient heterogeneous catalysts in extensive applications.
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Affiliation(s)
- Zheng Zhao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.,GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Haoxiang Xu
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zongyu Feng
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Yongqi Zhang
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Meisheng Cui
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Dapeng Cao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Daojian Cheng
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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49
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Xiao F, Qin X, Xu M, Zhu S, Zhang L, Hong Y, Choi SI, Chang Q, Xu Y, Pan X, Shao M. Impact of Heat Treatment on the Electrochemical Properties of Carbon-Supported Octahedral Pt–Ni Nanoparticles. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03206] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | | | - Mingjie Xu
- Fok Ying Tung Research Institute, The Hong Kong University of Science and Technology, Guangzhou 511458, People’s Republic of China
| | | | - LiLi Zhang
- Jiangsu Key Lab for Chemistry of Low-Dimension Materials, Huaiyin Normal University, Huaian 223300, China
| | - Youngmin Hong
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Korea
| | - Sang-Il Choi
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Korea
| | | | | | | | - Minhua Shao
- Fok Ying Tung Research Institute, The Hong Kong University of Science and Technology, Guangzhou 511458, People’s Republic of China
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50
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DeRita L, Resasco J, Dai S, Boubnov A, Thang HV, Hoffman AS, Ro I, Graham GW, Bare SR, Pacchioni G, Pan X, Christopher P. Structural evolution of atomically dispersed Pt catalysts dictates reactivity. NATURE MATERIALS 2019; 18:746-751. [PMID: 31011216 DOI: 10.1038/s41563-019-0349-9] [Citation(s) in RCA: 262] [Impact Index Per Article: 52.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/15/2019] [Indexed: 05/20/2023]
Abstract
The use of oxide-supported isolated Pt-group metal atoms as catalytic active sites is of interest due to their unique reactivity and efficient metal utilization. However, relationships between the structure of these active sites, their dynamic response to environments and catalytic functionality have proved difficult to experimentally establish. Here, sinter-resistant catalysts where Pt was deposited uniformly as isolated atoms in well-defined locations on anatase TiO2 nanoparticle supports were used to develop such relationships. Through a combination of in situ atomic-resolution microscopy- and spectroscopy-based characterization supported by first-principles calculations it was demonstrated that isolated Pt species can adopt a range of local coordination environments and oxidation states, which evolve in response to varied environmental conditions. The variation in local coordination showed a strong influence on the chemical reactivity and could be exploited to control the catalytic performance.
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Affiliation(s)
- Leo DeRita
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA
| | - Joaquin Resasco
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA
| | - Sheng Dai
- Department of Materials Science and Engineering, University of California Irvine, Irvine, CA, USA
| | - Alexey Boubnov
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Ho Viet Thang
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Milano, Italy
| | - Adam S Hoffman
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Insoo Ro
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA
| | - George W Graham
- Department of Materials Science and Engineering, University of California Irvine, Irvine, CA, USA
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Simon R Bare
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Gianfranco Pacchioni
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Milano, Italy
| | - Xiaoqing Pan
- Department of Materials Science and Engineering, University of California Irvine, Irvine, CA, USA
- Department of Physics and Astronomy, University of California Irvine, Irvine, CA, USA
- Irvine Materials Research Institute (IMRI), University of California Irvine, Irvine, CA, USA
| | - Phillip Christopher
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA.
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