Subject Area物理化学
Influence of particle sizes in the Au/ZrO2 catalysts for WGS reaction
Shen WJ(申文杰)
Conference NameThe 5th international conference on gold science, technology and its applications
Conference Date2009-7-26
Conference Place德国
Funding Organization海德堡大学
AbstractThe size effects of Au and ZrO2 particles on the structural property and the catalytic performance of Au/ZrO2 catalysts for the water gas shift reaction were extensively investigated. It was found that the Au-ZrO2 contact boundaries play essential roles in determining the catalytic reactivity. By keeping the size of Au particle to be ~3 nm, the increase in the particle size of ZrO2 from ~7 nm to ~55 nm caused significant decrease in the reaction rate. When the particle size of ZrO2 was fixed at ~20 nm, the conversion of CO decreased greatly with increasing the size of gold particles from 2.9 nm to 6.2 nm. IR spectroscopy and kinetic study revealed that the water gas shift reaction occurred at the Au-ZrO2 contact boundaries, where CO is adsorbed on Au particle and H2O is activated on the surface of ZrO2 through the formation of formate species, acting as key reaction intermediates.
Document Type会议论文
Corresponding AuthorShen WJ(申文杰)
Recommended Citation
GB/T 7714
Shen WJ. Influence of particle sizes in the Au/ZrO2 catalysts for WGS reaction[C],2009:293/1.
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