1
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Fu W, Yu Y, Yin K, Li Z, Tang M, Tian J, Wei G, Zhou S, Sun Y, Dai Y. Engineering Asymmetric Strain within C-Shaped CeO 2 Nanofibers for Stabilizing Sub-3 nm Pt Clusters against Sintering. ACS APPLIED MATERIALS & INTERFACES 2024; 16:47513-47523. [PMID: 39136725 DOI: 10.1021/acsami.4c08126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Ultrafine noble metals have emerged as advanced nanocatalysts in modern society but still suffer from unavoidable sintering at temperatures above 250 °C (e.g., Pt). In this work, closely packed CeO2 grains were confined elegantly in fibrous nanostructures and served as a porous support for stabilizing sub-3 nm Pt clusters. Through precisely manipulating the asymmetry of obtained nanofibers, uneven strain was induced within C-shaped CeO2 nanofibers with tensile strain at the outer side and compressive strain at the inner side. As a result, the enriched oxygen vacancies significantly improved adhesion of Pt to CeO2, thereby boosting the sinter-resistance of ultraclose sub-3 nm Pt clusters. Notably, no aggregation was observed even after exposure to humid air at 750 °C for 12 h, which is far beyond their Tammann temperature (sintering onset temperature, below 250 °C). In situ HAADF-STEM observation revealed a unique sintering mechanism, wherein Pt clusters initially migrate toward the grain boundaries with concentrated stain and undergo slight coalescence, followed by subsequent Ostwald ripening at higher temperatures. Moreover, the sinter-resistant Pt/C-shaped CeO2 effectively catalyzed soot combustion (over 700 °C) in a durable manner. This work provides a new insight for developing sinter-resistant catalysts from the perspective of strain engineering within nano-oxides.
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Affiliation(s)
- Wanlin Fu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Ying Yu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Kuibo Yin
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 211189, P. R. China
| | - Zhihui Li
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Mingyu Tang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Jilan Tian
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Guanzhao Wei
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Shiming Zhou
- Hefei National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yueming Sun
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
| | - Yunqian Dai
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
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2
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Guo M, Guan X, Meng Q, Gao ML, Li Q, Jiang HL. Tailoring Catalysis of Encapsulated Platinum Nanoparticles by Pore Wall Engineering of Covalent Organic Frameworks. Angew Chem Int Ed Engl 2024:e202410097. [PMID: 38953455 DOI: 10.1002/anie.202410097] [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: 05/28/2024] [Revised: 07/01/2024] [Accepted: 07/01/2024] [Indexed: 07/04/2024]
Abstract
While supported metal nanoparticles (NPs) have shown significant promise in heterogeneous catalysis, precise control over their interaction with the support, which profoundly impacts their catalytic performance, remains a significant challenge. In this study, Pt NPs are incorporated into thioether-functionalized covalent organic frameworks (denoted COF-Sx), enabling precise control over the size and electronic state of Pt NPs by adjusting the thioether density dangling on the COF pore walls. Notably, the resulting Pt@COF-Sx demonstrate exceptional selectivity (> 99 %) in catalytic hydrogenation of p-chloronitrobenzene to p-chloroaniline, in sharp contrast to the poor selectivity of Pt NPs embedded in thioether-free COFs. Furthermore, the conversion over Pt@COF-Sx exhibits a volcano-type curve as the thioether density increases, due to the corresponding change of accessible Pt sites. This work provides an effective approach to regulating the catalysis of metal NPs via their microenvironment modulation, with the aid of rational design and precise tailoring of support structure.
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Affiliation(s)
- Mingchun Guo
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xinyu Guan
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, Zhejiang, 310000, P. R. China
| | - Qiangqiang Meng
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Ming-Liang Gao
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Qunxiang Li
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Hai-Long Jiang
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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3
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Zhang X, Blackman C, Palgrave RG, Ashraf S, Dey A, Blunt MO, Zhang X, Liu T, Sun S, Zhu L, Guan J, Lu Y, Keal TW, Buckeridge J, Catlow CRA, Sokol AA. Environment-Driven Variability in Absolute Band Edge Positions and Work Functions of Reduced Ceria. J Am Chem Soc 2024; 146:16814-16829. [PMID: 38837941 PMCID: PMC11191696 DOI: 10.1021/jacs.4c05053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/22/2024] [Accepted: 05/22/2024] [Indexed: 06/07/2024]
Abstract
The absolute band edge positions and work function (Φ) are the key electronic properties of metal oxides that determine their performance in electronic devices and photocatalysis. However, experimental measurements of these properties often show notable variations, and the mechanisms underlying these discrepancies remain inadequately understood. In this work, we focus on ceria (CeO2), a material renowned for its outstanding oxygen storage capacity, and combine theoretical and experimental techniques to demonstrate environmental modifications of its ionization potential (IP) and Φ. Under O-deficient conditions, reduced ceria exhibits a decreased IP and Φ with significant sensitivity to defect distributions. In contrast, the IP and Φ are elevated in O-rich conditions due to the formation of surface peroxide species. Surface adsorbates and impurities can further augment these variabilities under realistic conditions. We rationalize the shifts in energy levels by separating the individual contributions from bulk and surface factors, using hybrid quantum mechanical/molecular mechanical (QM/MM) embedded-cluster and periodic density functional theory (DFT) calculations supported by interatomic-potential-based electrostatic analyses. Our results highlight the critical role of on-site electrostatic potentials in determining the absolute energy levels in metal oxides, implying a dynamic evolution of band edges under catalytic conditions.
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Affiliation(s)
- Xingfan Zhang
- Kathleen
Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
| | - Christopher Blackman
- Department
of Chemistry, University College London, Christopher Ingold Building, 20
Gordon Street, London WC1H
0AJ, U.K.
| | - Robert G. Palgrave
- Department
of Chemistry, University College London, Christopher Ingold Building, 20
Gordon Street, London WC1H
0AJ, U.K.
| | - Sobia Ashraf
- Department
of Chemistry, University College London, Christopher Ingold Building, 20
Gordon Street, London WC1H
0AJ, U.K.
| | - Avishek Dey
- Department
of Chemistry, University College London, Christopher Ingold Building, 20
Gordon Street, London WC1H
0AJ, U.K.
| | - Matthew O. Blunt
- Department
of Chemistry, University College London, Christopher Ingold Building, 20
Gordon Street, London WC1H
0AJ, U.K.
| | - Xu Zhang
- Kathleen
Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
- School of
Chemical Engineering and Technology, Tianjin
University, Tianjin 300350, P. R. China
| | - Taifeng Liu
- Kathleen
Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
- National
& Local Joint Engineering Research Center for Applied Technology
of Hybrid Nanomaterials, Henan University, Kaifeng 475004, China
| | - Shijia Sun
- Kathleen
Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
| | - Lei Zhu
- Kathleen
Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
| | - Jingcheng Guan
- Kathleen
Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
| | - You Lu
- Scientific
Computing Department, STFC Daresbury Laboratory, Warrington WA4 4AD, Cheshire, U.K.
| | - Thomas W. Keal
- Scientific
Computing Department, STFC Daresbury Laboratory, Warrington WA4 4AD, Cheshire, U.K.
| | - John Buckeridge
- School
of Engineering, London South Bank University, London SE1 OAA, U.K.
| | - C. Richard A. Catlow
- Kathleen
Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
- School
of Chemistry, Cardiff University, Park Place, Cardiff CF10 1AT, U.K.
| | - Alexey A. Sokol
- Kathleen
Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
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4
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Tong S, Gao X, Zhou H, Shi Q, Wu Y, Chen W. Synergistic Roles of the CoO/Co Heterostructure and Pt Single Atoms for High-Efficiency Electrocatalytic Hydrogenation of Lignin-Derived Bio-Oils. Inorg Chem 2023; 62:19123-19134. [PMID: 37945002 DOI: 10.1021/acs.inorgchem.3c03338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Electrochemical hydrogeneration (ECH) of biomass-derived platform molecules, which avoids the disadvantages in utilizing fossil fuel and gaseous hydrogen, is a promising route toward value-added chemicals production. Herein, we reported a CoO/Co heterostructure-supported Pt single atoms electrocatalyst (Pt1-CoO/Co) that exhibited an outstanding performance with a high conversion (>99%), a high Faradaic efficiency (87.6%), and robust stability (24 recyclability) at -20 mA/cm2 for electrochemical phenol hydrogenation to high-valued KA oil (a mixture of cyclohexanol and cyclohexanone). Experimental results and the density functional theory calculations demonstrated that Pt1-CoO/Co presented strong adsorption of phenol and hydrogen on the catalyst surface simultaneously, which was conducive to the transfer of the adsorbed hydrogen generated on the single atom Pt sites to activated phenol, and then, ECH of phenol with high performance was achieved instead of the direct hydrogen evolution reaction. This work described that the multicomponent synergistic single atom catalysts could effectively accelerate the ECH of phenol, which could help the achievement of large-scale biomass upgrading.
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Affiliation(s)
- Shijun Tong
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Xiaoping Gao
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Huang Zhou
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Qian Shi
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yuen Wu
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Wei Chen
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
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5
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Wang B, Liang Y, Tong K, Ma H, Zhang Z, Fan W, Xuan Y, Zhang K, Yun Y, Wang D, Luan T. What is the role of interface in the catalytic elimination of multi-carbon air pollutants? CHEMOSPHERE 2023; 338:139547. [PMID: 37467856 DOI: 10.1016/j.chemosphere.2023.139547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/10/2023] [Accepted: 07/15/2023] [Indexed: 07/21/2023]
Abstract
Multi-carbon air pollutants pose serious hazards to the environment and health, especially soot and volatile organic compounds (VOCs). Catalytic oxidation is one of the most effective technologies for eliminating them. The oxidation of soot and most hydrocarbon VOCs begins with C-H (or edge-CH) activation, so this commonality can be targeted to design active sites. Rationally designed interface nanostructures optimize metal-support interactions (MSIs), providing suitable active sites for C-H activation. Meanwhile, the interfacial reactant spillover facilitates the further decomposition of activated intermediates. Thus, rationally exploiting interfacial effects is critical to enhancing catalytic activity. In this review, we analyzed recent advances in the following aspects: I. Understanding of the interface effects and design; II. Optimization of the catalyst-reactant contact, metal-support interface, and MSIs; III. Design of the interfacial composition and perimeter. Based on the analysis of the advances and current status, we provided challenges and opportunities for the rational design of interface nanostructures and interface-related stability. Meanwhile, a critical outlook was given on the interfacial sites of single-atom catalysts (SACs) for specific activation and catalytic selectivity.
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Affiliation(s)
- Bin Wang
- School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
| | - Yanjie Liang
- School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
| | - Kangbo Tong
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi, 030006, China
| | - Hongyuan Ma
- School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
| | | | - Wenjie Fan
- School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
| | - Yue Xuan
- School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
| | - Kaihang Zhang
- School of Civil and Environmental Engineering and the Brook Byers Institute for Sustainable Systems, Georgia Institute of Technology, 828 West Peachtree Street, Atlanta, GA, 30332, USA
| | - Yang Yun
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi, 030006, China.
| | - Dong Wang
- School of Energy and Power Engineering, Shandong University, Jinan, 250061, China.
| | - Tao Luan
- School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
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6
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Zhang H, Muravev V, Liu L, Liutkova A, Simons JFM, Detlefs B, Yang H, Kosinov N, Hensen EJM. Pt/CeO 2 as Catalyst for Nonoxidative Coupling of Methane: Oxidative Regeneration. J Phys Chem Lett 2023; 14:6778-6783. [PMID: 37478302 PMCID: PMC10405266 DOI: 10.1021/acs.jpclett.3c01179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 07/18/2023] [Indexed: 07/23/2023]
Abstract
Direct nonoxidative coupling is a promising route for methane upgrading, yet its commercialization is hindered by the lack of efficient catalysts. Pt/CeO2 catalysts with isolated Pt species have attracted an increasing amount of interest in recent years. Herein, we studied the catalytic role and evolution of isolated Pt centers on CeO2 prepared by flame spray pyrolysis under the harsh reaction conditions of nonoxidative methane coupling. During the reaction at 800 °C, the isolated Pt sites sinter, leading to a loss of the ethylene and ethane yield. The agglomerated Pt can be redispersed by using an in situ regeneration strategy in oxygen. We found that isolated Pt centers are able to activate methane only at the initial reaction stage, and the CePt5 alloy acts as the active phase in the prolonged reaction.
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Affiliation(s)
- Hao Zhang
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Valery Muravev
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Liang Liu
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Anna Liutkova
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Jérôme F. M. Simons
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Blanka Detlefs
- European
Synchrotron Radiation Facility, 71 avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Huaizhou Yang
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Nikolay Kosinov
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory
of Inorganic Materials and Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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7
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Zhang Z, Tian J, Lu Y, Yang S, Jiang D, Huang W, Li Y, Hong J, Hoffman AS, Bare SR, Engelhard MH, Datye AK, Wang Y. Memory-dictated dynamics of single-atom Pt on CeO 2 for CO oxidation. Nat Commun 2023; 14:2664. [PMID: 37160890 PMCID: PMC10169862 DOI: 10.1038/s41467-023-37776-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 03/30/2023] [Indexed: 05/11/2023] Open
Abstract
Single atoms of platinum group metals on CeO2 represent a potential approach to lower precious metal requirements for automobile exhaust treatment catalysts. Here we show the dynamic evolution of two types of single-atom Pt (Pt1) on CeO2, i.e., adsorbed Pt1 in Pt/CeO2 and square planar Pt1 in PtATCeO2, fabricated at 500 °C and by atom-trapping method at 800 °C, respectively. Adsorbed Pt1 in Pt/CeO2 is mobile with the in situ formation of few-atom Pt clusters during CO oxidation, contributing to high reactivity with near-zero reaction order in CO. In contrast, square planar Pt1 in PtATCeO2 is strongly anchored to the support during CO oxidation leading to relatively low reactivity with a positive reaction order in CO. Reduction of both Pt/CeO2 and PtATCeO2 in CO transforms Pt1 to Pt nanoparticles. However, both catalysts retain the memory of their initial Pt1 state after reoxidative treatments, which illustrates the importance of the initial single-atom structure in practical applications.
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Affiliation(s)
- Zihao Zhang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA
| | - Jinshu Tian
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Yubing Lu
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Shize Yang
- Eyring Materials Center, Arizona State University, Tempe, AZ, 85257, USA
| | - Dong Jiang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA
| | - Weixin Huang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA
| | - Yixiao Li
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA
| | - Jiyun Hong
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Adam S Hoffman
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Simon R Bare
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Mark H Engelhard
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Abhaya K Datye
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Yong Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99354, USA.
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164, USA.
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8
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Xiong G, Feng C, Chen HC, Li J, Jiang F, Tao S, Wang Y, Li Y, Pan Y. Atomically Dispersed Pt-Doped Co 3 O 4 Spinel Nanoparticles Embedded in Polyhedron Frames for Robust Propane Oxidation at Low Temperature. SMALL METHODS 2023:e2300121. [PMID: 37002182 DOI: 10.1002/smtd.202300121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/04/2023] [Indexed: 06/19/2023]
Abstract
This study adopts a facile and effective in situ encapsulation-oxidation strategy for constructing a coupling catalyst composed of atomically dispersed Pt-doped Co3 O4 spinel nanoparticles (NPs) embedded in polyhedron frames (PFs) for robust propane total oxidation. Benefiting from the abundant oxygen vacancies and more highly valent active Co3+ species caused by the doping of Pt atoms as well as the confinement effect, the optimized 0.2Pt-Co3 O4 NPs/PFs catalyst exhibits excellent propane catalytic activity with low T90 (184 °C), superior apparent reaction rate (21.62×108 (mol gcat -1 s-1 )), low apparent activation energy (Ea = 17.89 kJ mol-1 ), high turnover frequency ( 811×107 (mol gcat -1 s-1 )) as well as good stability. In situ diffuse reflectance infrared Fourier transform spectroscopy and density functional theory calculations indicate that the doping of Pt atoms enhances the oxygen activation ability, and decreases the energy barrier required for CH bond breaking, thus improving the deep oxidation process of the intermediate species. This study opens up new ideas for constructing coupling catalysts from atomic scale with low cost to enhance the activation of oxygen molecules and the deep oxidation of linear short chain alkanes at low temperature.
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Affiliation(s)
- Gaoyan Xiong
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Chao Feng
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Hsiao-Chien Chen
- Center for Reliability Science and Technologies, Center for Green Technology, Chang Gung University, Taoyuan, 33302, Taiwan
- Kidney Research Center, Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taoyuan, 33305, Taiwan
| | - Junxi Li
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Fei Jiang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Shu Tao
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Yunxia Wang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Yichuan Li
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Yuan Pan
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
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9
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Liu Q, Yang P, Tan W, Yu H, Ji J, Wu C, Cai Y, Xie S, Liu F, Hong S, Ma K, Gao F, Dong L. Fabricating Robust Pt Clusters on Sn-Doped CeO 2 for CO Oxidation: A Deep Insight into Support Engineering and Surface Structural Evolution. Chemistry 2023; 29:e202203432. [PMID: 36567623 DOI: 10.1002/chem.202203432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/20/2022] [Accepted: 12/25/2022] [Indexed: 12/27/2022]
Abstract
The size effect on nanoparticles, which affects the catalysis performance in a significant way, is crucial. The tuning of oxygen vacancies on metal-oxide support can help reduce the size of the particles in active clusters of Pt, thus improving catalysis performance of the supported catalyst. Herein, Ce-Sn solid solutions (CSO) with abundant oxygen vacancies have been synthesized. Activated by simple CO reduction after loading Pt species, the catalytic CO oxidation performance of Pt/CSO was significantly better than that of Pt/CeO2 . The reasons for the elevated activity were further explored regarding ionic Pt single sites being transformed into active Pt clusters after CO reduction. Due to more exposed oxygen vacancies, much smaller Pt clusters were created on CSO (ca. 1.2 nm) than on CeO2 (ca. 1.8 nm). Consequently, more exposed active Pt clusters significantly improved the ability to activate oxygen and directly translated to the higher catalytic oxidation performance of activated Pt/CSO catalysts in vehicle emission control applications.
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Affiliation(s)
- Qinglong Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Peng Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Wei Tan
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Haowei Yu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Jiawei Ji
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Cong Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yandi Cai
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Shaohua Xie
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL 32816, United States
| | - Fudong Liu
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL 32816, United States
| | - Song Hong
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100027, China
| | - Kaili Ma
- Analysis and Testing Center, Southeast University, Nanjing, 211189, China
| | - Fei Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Lin Dong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment; Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
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10
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Wang Y, Wang M. Recent progresses on single-atom catalysts for the removal of air pollutants. Front Chem 2022; 10:1039874. [DOI: 10.3389/fchem.2022.1039874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 10/10/2022] [Indexed: 11/13/2022] Open
Abstract
The booming industrialization has aggravated emission of air pollutants, inflicting serious harm on environment and human health. Supported noble-metals are one of the most popular catalysts for the oxidation removal of air pollutants. Unfortunately, the high price and large consumption restrict their development and practical application. Single-atom catalysts (SACs) emerge and offer an optimizing approach to address this issue. Due to maximal atom utilization, tunable coordination and electron environment and strong metal-support interaction, SACs have shown remarkable catalytic performance on many reactions. Over the last decade, great potential of SACs has been witnessed in the elimination of air pollutants. In this review, we first briefly summarize the synthesis methods and modulation strategies together with the characterization techniques of SACs. Next, we highlight the application of SACs in the abatement of air pollutants including CO, volatile organic compounds (VOCs) and NOx, unveiling the related catalytic mechanism of SACs. Finally, we propose the remaining challenges and future perspectives of SACs in fundamental research and practical application in the field of air pollutant removal.
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11
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Cai T, Teng Z, Wen Y, Zhang H, Wang S, Fu X, Song L, Li M, Lv J, Zeng Q. Single-atom site catalysts for environmental remediation: Recent advances. JOURNAL OF HAZARDOUS MATERIALS 2022; 440:129772. [PMID: 35988491 DOI: 10.1016/j.jhazmat.2022.129772] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 06/15/2023]
Abstract
Single-atom site catalysts (SACs) can maximize the utilization of active metal species and provide an attractive way to regulate the activity and selectivity of catalytic reactions. The adjustable coordination configuration and atomic structure of SACs enable them to be an ideal candidate for revealing reaction mechanisms in various catalytic processes. The minimum use of metals and relatively tight anchoring of the metal atoms significantly reduce leaching and environmental risks. Additionally, the unique physicochemical properties of single atom sites endow SACs with superior activity in various catalytic processes for environmental remediation (ER). Generally, SACs are burgeoning and promising materials in the application of ER. However, a systematic and critical review on the mechanism and broad application of SACs-based ER is lacking. Herein, we review emerging studies applying SACs for different ERs, such as eliminating organic pollutants in water, removing volatile organic compounds, purifying automobile exhaust, and others (hydrodefluorination and disinfection). We have summarized the synthesis, characterization, reaction mechanism and structural-function relationship of SACs in ER. In addition, the perspectives and challenges of SACs for ER are also analyzed. We expect that this review can provide constructive inspiration for discoveries and applications of SACs in environmental catalysis in the future.
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Affiliation(s)
- Tao Cai
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Zhenzhen Teng
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yanjun Wen
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Huayang Zhang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Shaobin Wang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia.
| | - Xijun Fu
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Lu Song
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Mi Li
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Junwen Lv
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
| | - Qingyi Zeng
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, China.
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12
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Abstract
The field of single-atom catalysis (SAC) has expanded greatly in recent years. While there has been much success developing new synthesis methods, a fundamental disconnect exists between most experiments and the theoretical computations used to model them. The real catalysts are based on powder supports, which inevitably contain a multitude of different facets, different surface sites, defects, hydroxyl groups, and other contaminants due to the environment. This makes it extremely difficult to determine the structure of the active SAC site using current techniques. To be tractable, computations aimed at modeling SAC utilize periodic boundary conditions and low-index facets of an idealized support. Thus, the reaction barriers and mechanisms determined computationally represent, at best, a plausibility argument, and there is a strong chance that some critical aspect is omitted. One way to better understand what is plausible is by experimental modeling, i.e., comparing the results of computations to experiments based on precisely defined single-crystalline supports prepared in an ultrahigh-vacuum (UHV) environment. In this review, we report the status of the surface-science literature as it pertains to SAC. We focus on experimental work on supports where the site of the metal atom are unambiguously determined from experiment, in particular, the surfaces of rutile and anatase TiO2, the iron oxides Fe2O3 and Fe3O4, as well as CeO2 and MgO. Much of this work is based on scanning probe microscopy in conjunction with spectroscopy, and we highlight the remarkably few studies in which metal atoms are stable on low-index surfaces of typical supports. In the Perspective section, we discuss the possibility for expanding such studies into other relevant supports.
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Affiliation(s)
- Florian Kraushofer
- Institute of Applied Physics, Technische Universitat Wien, 1040 Vienna, Austria
| | - Gareth S. Parkinson
- Institute of Applied Physics, Technische Universitat Wien, 1040 Vienna, Austria
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13
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Wan W, Geiger J, Berdunov N, Lopez Luna M, Chee SW, Daelman N, López N, Shaikhutdinov S, Roldan Cuenya B. Highly Stable and Reactive Platinum Single Atoms on Oxygen Plasma-Functionalized CeO 2 Surfaces: Nanostructuring and Peroxo Effects. Angew Chem Int Ed Engl 2022; 61:e202112640. [PMID: 35243735 PMCID: PMC9315031 DOI: 10.1002/anie.202112640] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Indexed: 12/12/2022]
Abstract
Atomically dispersed precious metals on oxide supports have recently become increasingly interesting catalytic materials. Nonetheless, their non-trivial preparation and limited thermal and environmental stability constitutes an issue for their potential applications. Here we demonstrate that an oxygen plasma pre-treatment of the ceria (CeO2 ) surface serves to anchor Pt single atoms, making them active and resistant towards sintering in the CO oxidation reaction. Through a combination of experimental results obtained on well-defined CeO2 films and theory, we show that the O2 plasma causes surface nanostructuring and the formation of surface peroxo (O2 2- ) species, favoring the uniform and dense distribution of isolated strongly bonded Pt2+ atoms. The promotional effect of the plasma treatment was further demonstrated on powder Pt/CeO2 catalysts. We believe that plasma functionalization can be applied to other metal/oxide systems to achieve tunable and stable catalysts with a high density of active sites.
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Affiliation(s)
- Weiming Wan
- Department of Interface ScienceFritz Haber InstituteFaradayweg 4–614195BerlinGermany
| | - Julian Geiger
- Institute of Chemical Research of CataloniaThe Barcelona Institute of Science and Technology Institution43007TarragonaSpain
| | - Nikolay Berdunov
- Department of Interface ScienceFritz Haber InstituteFaradayweg 4–614195BerlinGermany
| | - Mauricio Lopez Luna
- Department of Interface ScienceFritz Haber InstituteFaradayweg 4–614195BerlinGermany
| | - See Wee Chee
- Department of Interface ScienceFritz Haber InstituteFaradayweg 4–614195BerlinGermany
| | - Nathan Daelman
- Institute of Chemical Research of CataloniaThe Barcelona Institute of Science and Technology Institution43007TarragonaSpain
| | - Núria López
- Institute of Chemical Research of CataloniaThe Barcelona Institute of Science and Technology Institution43007TarragonaSpain
| | - Shamil Shaikhutdinov
- Department of Interface ScienceFritz Haber InstituteFaradayweg 4–614195BerlinGermany
| | - Beatriz Roldan Cuenya
- Department of Interface ScienceFritz Haber InstituteFaradayweg 4–614195BerlinGermany
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