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学科主题: 物理化学
题名: Influence of particle sizes in the Au/ZrO2 catalysts for WGS reaction
作者: Shen WJ(申文杰)
会议名称: The 5th international conference on gold science, technology and its applications
会议日期: 2009-7-26
出版日期: 2009-07-26
会议地点: 德国
通讯作者: 申文杰
部门归属: 五室
主办者: 海德堡大学
摘要: The 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.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/113578
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Shen WJ. Influence of particle sizes in the Au/ZrO2 catalysts for WGS reaction[C]. 见:The 5th international conference on gold science, technology and its applications. 德国. 2009-7-26.
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