Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (10): 1534-1539.DOI: 10.1016/S1872-2067(19)63388-7

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Facet-dependent anchoring of gold nanoparticles on TiO2 for CO oxidation

Bin Shaoa,b,c, Wenning Zhaoa,c, Shu Miaoa, Jiahui Huanga,b, Lili Wanga,b, Gao Lia, Wenjie Shena   

  1. a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b Gold Catalysis of Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    c University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-06-26 Revised:2019-07-27 Online:2019-10-18 Published:2019-08-26
  • Supported by:
    This work was supported by Liaoning Revitalization Talents Program (XLYC1807121) and National Natural Science Foundation of China (20673054).

Abstract: The interfacial perimeter of gold nanocatalysts is popularly viewed as the active sites for a number of chemical reactions, while the geometrical structure of the interface at atomic scale is less known. Here, TiO2-nanosheets and nanospindles were adapted to accommodate Au particles (~2.2 nm), forming Au-TiO2{001} and Au-TiO2{101} interfaces. Upon calcination at 623 K in air, HAADF-STEM images evidenced that the Au particles on TiO2{101} enlarged to 3.1 nm and these on TiO2{001} remained unchanged, suggesting the stronger metal-support interaction on TiO2{001}. Au/TiO2{001} was more active for CO oxidation than Au/TiO2{101} system.

Key words: Au nanoparticles, Titanium dioxide, Stability, Interfacial perimeter, CO oxidation