Citation: Qi Yang, Linying Du, Xu Wang, Chunjiang Jia, Rui Si. CO oxidation over Au/ZrLa-doped CeO₂ catalysts: Synergistic effect of zirconium and lanthanum[J]. Chinese Journal of Catalysis, ;2016, 37(8): 1331-1339. doi: 10.1016/S1872-2067(15)61113-5 shu

CO oxidation over Au/ZrLa-doped CeO₂ catalysts: Synergistic effect of zirconium and lanthanum

Qi Yang ^a, ,
Linying Du ^b ,
Xu Wang ^a ,
Chunjiang Jia ^b ,
Rui Si ^a

a. Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;
b. Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China

Received Date: 1 March 2016
Revised Date: 15 April 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21301107, 21373259)

The physicochemical properties of nanosized Au catalysts supported on doped CeO₂ and their catalytic performance for the CO oxidation reaction were investigated. The Au/Zr-doped CeO₂ catalyst is much more active than undoped Au/CeO₂, while Au/ZrLa-doped CeO₂ shows the highest activity. Characterization of the catalysts by X-ray diffraction, transmission electron microscopy (TEM), high-resolution TEM, and the X-ray absorption fine structure technique shows high homogeneity of the oxide supports and well-dispersed nanosized Au nanoparticles. Raman spectroscopy, X-ray photoelectron spectroscopy, and H₂-tempeature-programmed reduction show that the surface oxygen species are the main factor for the catalytic activity in the CO oxidation reaction, while the supported Au species can improve the redox properties and create oxygen vacancy sites on the support. The oxidation state of Au is not the main factor governing the activity of Au/doped-CeO₂ catalysts. Additionally, the synergistic effect of Zr and La is discussed.
- Gold catalyst,
- Doped ceria,
- Oxygen vacancy,
- Carbon monoxide oxidation,
- Metal-support interaction
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CO oxidation over Au/ZrLa-doped CeO2 catalysts: Synergistic effect of zirconium and lanthanum

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CO oxidation over Au/ZrLa-doped CeO₂ catalysts: Synergistic effect of zirconium and lanthanum