Citation: Yan Zhou, Aling Chen, Jing Ning, Wenjie Shen. Electronic and geometric structure of the copper-ceria interface on Cu/CeO₂ catalysts[J]. Chinese Journal of Catalysis, ;2020, 41(6): 928-937. doi: 10.1016/S1872-2067(20)63540-9 shu

Electronic and geometric structure of the copper-ceria interface on Cu/CeO₂ catalysts

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

Received Date: 21 October 2019
Revised Date: 29 November 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (21761132031, 21533009, 91645107, 21621063).

The atomic structure of the active sites in Cu/CeO₂ catalystsis intimately associated with the copper-ceria interaction. Both the shape of ceria and the loading of copper affect the chemical bonding of copper species on ceria surfaces and the electronic and geometric character of the relevant interfaces. Nanostructured ceria, including particles (polyhedra), rods, and cubes, provides anchoring sites for the copper species. The atomic arrangements and chemical properties of the (111), (110) and (100) facets, preferentially exposed depending on the shape of ceria, govern the copper-ceria interactions and in turn determine their catalytic properties. Also, the metal loading significantly influences the dispersion of copper species on ceria with a specific shape, forming copper layers, clusters, and nanoparticles. Lower copper contents result in copper monolayers and/or bilayers while higher copper loadings lead to multi-layered clusters and faceted particles. The active sites are usually generated via interactions between the copper atoms in the metal species and the oxygen vacancies on ceria, which is closely linked to the number and density of surface oxygen vacancies dominated by the shape of ceria.
- Cu/CeO₂ catalyst,
- Ceria shape,
- Oxygen vacancy,
- Copper particle,
- Copper-ceria interface
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沈阳化工大学材料科学与工程学院沈阳 110142

Electronic and geometric structure of the copper-ceria interface on Cu/CeO2 catalysts

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通讯作者: 陈斌, bchen63@163.com

Electronic and geometric structure of the copper-ceria interface on Cu/CeO₂ catalysts