1
|
Precise control of Pt encapsulation in zeolite-based catalysts for a stable low-temperature CO oxidation reaction. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1383-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
2
|
Yi Z, Lin L, Chang Y, Luo X, Gao J, Mu R, Ning Y, Fu Q, Bao X. Dynamic transformation between bilayer islands and dinuclear clusters of Cr oxide on Au(111) through environment and interface effects. Proc Natl Acad Sci U S A 2022; 119:e2120716119. [PMID: 35605120 PMCID: PMC9295788 DOI: 10.1073/pnas.2120716119] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 04/15/2022] [Indexed: 11/18/2022] Open
Abstract
SignificanceFor oxide catalysts, it is important to elucidate and further control their atomic structures. In this work, well-defined CrO2 bilayer islands and Cr2O7 dinuclear clusters have been grown on Au(111) and unambiguously identified by scanning tunneling microscopy and theoretical calculations. Upon cycled redox treatments, the two kinds of oxide nanostructures can be reversibly transformed. It is interesting to note that both Cr oxides do not exist in bulk but need to be stabilized by the metal surface and the specific environment. Our results suggest that both redox atmosphere and interface confinement effects can be used to construct an oxide nanostructure with the specific chemical state and structure.
Collapse
Affiliation(s)
- Zhiyu Yi
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Le Lin
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yuan Chang
- Key Laboratory of Material Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, China
| | - Xuda Luo
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junfeng Gao
- Key Laboratory of Material Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, China
| | - Rentao Mu
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yanxiao Ning
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Qiang Fu
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xinhe Bao
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| |
Collapse
|
3
|
Li Y, Zhang Y, Qian K, Huang W. Metal–Support Interactions in Metal/Oxide Catalysts and Oxide–Metal Interactions in Oxide/Metal Inverse Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04854] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yangyang Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- School of Pharmacy, Anhui University of Chinese Medicine, Anhui Academy of Chinese Medicine, Hefei 230012, China
| | - Yunshang Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Kun Qian
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Weixin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, 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
| |
Collapse
|
4
|
Li Z, Huang W. Hydride species on oxide catalysts. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:433001. [PMID: 34311453 DOI: 10.1088/1361-648x/ac17ad] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
Hydride species on oxide catalysts are widely involved in oxide-catalyzed reactions, and relevant fundamental understanding is important to establish reaction mechanisms and structure-performance relations of oxide catalysts. In this topical review, recent progresses on the formation and reactivity of hydride species on the surface or in the bulk of oxides are briefly summarized. Firstly, characterization techniques for hydride species are introduced. Secondly, formation of hydride species on the surface or in the bulk of various oxides and their reactivity in oxide-catalyzed hydrogenation and dehydrogenation reactions are reviewed. Finally, short summary and outlook are given.
Collapse
Affiliation(s)
- Zhaorui Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Weixin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Dalian National Laboratory for Clean Energy, Dalian 116023, People's Republic of China
| |
Collapse
|
5
|
Li Z, Werner K, Chen L, Jia A, Qian K, Zhong J, You R, Wu L, Zhang L, Pan H, Wu X, Gong X, Shaikhutdinov S, Huang W, Freund H. Interaction of Hydrogen with Ceria: Hydroxylation, Reduction, and Hydride Formation on the Surface and in the Bulk. Chemistry 2021; 27:5268-5276. [PMID: 33355967 PMCID: PMC8048454 DOI: 10.1002/chem.202005374] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Indexed: 11/11/2022]
Abstract
The study reports the first attempt to address the interplay between surface and bulk in hydride formation in ceria (CeO2 ) by combining experiment, using surface sensitive and bulk sensitive spectroscopic techniques on the two sample systems, i.e., CeO2 (111) thin films and CeO2 powders, and theoretical calculations of CeO2 (111) surfaces with oxygen vacancies (Ov ) at the surface and in the bulk. We show that, on a stoichiometric CeO2 (111) surface, H2 dissociates and forms surface hydroxyls (OH). On the pre-reduced CeO2-x samples, both films and powders, hydroxyls and hydrides (Ce-H) are formed on the surface as well as in the bulk, accompanied by the Ce3+ ↔ Ce4+ redox reaction. As the Ov concentration increases, hydroxyl is destabilized and hydride becomes more stable. Surface hydroxyl is more stable than bulk hydroxyl, whereas bulk hydride is more stable than surface hydride. The surface hydride formation is the kinetically favorable process at relatively low temperatures, and the resulting surface hydride may diffuse into the bulk region and be stabilized therein. At higher temperatures, surface hydroxyls can react to produce water and create additional oxygen vacancies, increasing its concentration, which controls the H2 /CeO2 interaction. The results demonstrate a large diversity of reaction pathways, which have to be taken into account for better understanding of reactivity of ceria-based catalysts in a hydrogen-rich atmosphere.
Collapse
Affiliation(s)
- Zhaorui Li
- Hefei National Laboratory for Physical Sciences at MicroscaleKey Laboratory of Surface and Interface Chemistry and Energy Catalysis, of Anhui Higher Education InstitutesCAS Key Laboratory of Materials, for Energy Conversion and Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei230026P. R. China
| | - Kristin Werner
- Fritz-Haber-Institut der Max-Planck GesellschaftFaradayweg 4–6Berlin14195Germany
| | - Lu Chen
- Key Laboratory for Advanced Materials and Joint International Research, Laboratory for Precision Chemistry and Molecular EngineeringFeringa, Nobel Prize Scientist Joint Research CenterCentre for Computational, Chemistry and Research Institute of Industrial CatalysisSchool of, Chemistry and Molecular EngineeringEast China University of Science, and Technology130 Meilong RoadShanghai200237P. R. China
| | - Aiping Jia
- Hefei National Laboratory for Physical Sciences at MicroscaleKey Laboratory of Surface and Interface Chemistry and Energy Catalysis, of Anhui Higher Education InstitutesCAS Key Laboratory of Materials, for Energy Conversion and Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei230026P. R. China
- Key Laboratory of the Ministry of Education for Advanced Catalysis, MaterialsInstitute of Physical ChemistryZhejiang Normal UniversityJinhua321004P. R. China
| | - Kun Qian
- Hefei National Laboratory for Physical Sciences at MicroscaleKey Laboratory of Surface and Interface Chemistry and Energy Catalysis, of Anhui Higher Education InstitutesCAS Key Laboratory of Materials, for Energy Conversion and Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei230026P. R. China
| | - Jian‐Qiang Zhong
- Fritz-Haber-Institut der Max-Planck GesellschaftFaradayweg 4–6Berlin14195Germany
| | - Rui You
- Hefei National Laboratory for Physical Sciences at MicroscaleKey Laboratory of Surface and Interface Chemistry and Energy Catalysis, of Anhui Higher Education InstitutesCAS Key Laboratory of Materials, for Energy Conversion and Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei230026P. R. China
| | - Lihui Wu
- National Synchrotron Radiation LaboratoryUniversity of, Science and Technology of ChinaHefei230029P. R. China
| | - Liyuan Zhang
- Hefei National Laboratory for Physical Sciences at MicroscaleKey Laboratory of Surface and Interface Chemistry and Energy Catalysis, of Anhui Higher Education InstitutesCAS Key Laboratory of Materials, for Energy Conversion and Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei230026P. R. China
| | - Haibin Pan
- National Synchrotron Radiation LaboratoryUniversity of, Science and Technology of ChinaHefei230029P. R. China
| | - Xin‐Ping Wu
- Key Laboratory for Advanced Materials and Joint International Research, Laboratory for Precision Chemistry and Molecular EngineeringFeringa, Nobel Prize Scientist Joint Research CenterCentre for Computational, Chemistry and Research Institute of Industrial CatalysisSchool of, Chemistry and Molecular EngineeringEast China University of Science, and Technology130 Meilong RoadShanghai200237P. R. China
| | - Xue‐Qing Gong
- Key Laboratory for Advanced Materials and Joint International Research, Laboratory for Precision Chemistry and Molecular EngineeringFeringa, Nobel Prize Scientist Joint Research CenterCentre for Computational, Chemistry and Research Institute of Industrial CatalysisSchool of, Chemistry and Molecular EngineeringEast China University of Science, and Technology130 Meilong RoadShanghai200237P. R. China
| | - Shamil Shaikhutdinov
- Fritz-Haber-Institut der Max-Planck GesellschaftFaradayweg 4–6Berlin14195Germany
| | - Weixin Huang
- Hefei National Laboratory for Physical Sciences at MicroscaleKey Laboratory of Surface and Interface Chemistry and Energy Catalysis, of Anhui Higher Education InstitutesCAS Key Laboratory of Materials, for Energy Conversion and Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei230026P. R. China
- Dalian National Laboratory for Clean EnergyDalian116023P. R. China
| | - Hans‐Joachim Freund
- Fritz-Haber-Institut der Max-Planck GesellschaftFaradayweg 4–6Berlin14195Germany
| |
Collapse
|
6
|
|
7
|
Atomically dispersed copper species on ceria for the low-temperature water-gas shift reaction. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9867-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
8
|
Abstract
The strong metal-support interaction (SMSI) is one of the most important concepts in heterogeneous catalysis. Herein we report a study of Pt-TiO2 SMSI using Pt/rutile TiO2(110) model catalysts with different Pt particle sizes by means of X-ray photoelectron spectroscopy, ion scattering spectroscopy, and the adsorption of probe molecules. The acquired results unambiguously demonstrate a size dependence of the Pt-TiO2 SMSI, in which SMSI occurs barely between supported Pt clusters and the TiO2(110) substrate but obviously between supported Pt nanoparticles and the TiO2(110) substrate. Such a size-dependent SMSI could be associated with size-dependent electronic structures of the supported Pt particles. These results highlight the sensitivity of the SMSI to the size of supported metal particles, which greatly advances the fundamental understanding.
Collapse
Affiliation(s)
- Zongfang Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Heifei 230026, P. R. China
| | - Yangyang Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Heifei 230026, P. R. China
| | - Weixin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Heifei 230026, P. R. China
- Dalian National Laboratory for Clean Energy, Dalian 116023, P. R. China
| |
Collapse
|
9
|
Wu L, Fu C, Huang W. Surface chemistry of TiO 2 connecting thermal catalysis and photocatalysis. Phys Chem Chem Phys 2020; 22:9875-9909. [PMID: 32363360 DOI: 10.1039/c9cp07001j] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chemical reactions catalyzed under heterogeneous conditions have recently expanded rapidly from traditional thermal catalysis to photocatalysis due to the rising concerns about sustainable development of energy and the environment. Adsorption of reactants on catalyst surfaces, subsequent surface reactions, and desorption of products from catalyst surfaces occur in both thermal catalysis and photocatalysis. TiO2 catalysts are widely used in thermal catalytic and photocatalytic reactions. Herein we review recent progress in surface chemistry, thermal catalysis and photocatalysis of TiO2 model catalysts from single crystals to nanocrystals with the aim of examining if the surface chemistry of TiO2 can bridge the fundamental understanding between thermal catalysis and photocatalysis. Following a brief introduction, the structures of major facets exposed on TiO2 catalysts, including surface reconstructions and defects, as well as the electronic structure and charge properties, are firstly summarized; then the recent progress in adsorption, thermal chemistry and photochemistry of small molecules on TiO2 single crystals and nanocrystals is comprehensively reviewed, focusing on manifesting the structure-(photo)activity relations and the commonalities/differences between thermal catalysis and photocatalysis; and finally concluding remarks and perspectives are given.
Collapse
Affiliation(s)
- Longxia Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China.
| | | | | |
Collapse
|