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题名: Influence of chemical states of Au on CO oxidation over Au/CoCeOx catalyst
作者: Ta Na1;  Zhang Milin1;  Li Juan2;  Li Huaju2;  Shen Wenjie2
关键词: cobalt oxide ;  ceria ;  composite oxide ;  gold ;  chemical state ;  carbon monoxide ;  low temperature oxidation
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2008-08-01
卷: 29, 期:8, 页:777-782
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Au/CoCeOx catalysts were prepared by I deposition-precipitation method. Au chemical states were controlled by varying the temperature of pretreatment in an oxygen-containing atmosphere. The catalysts were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, temperature-programmed reduction, and X-ray photoelectron spectroscopy. The catalytic performance for CO oxidation was Investigated at ambient temperature. It was found that the conversion of CO increased with increasing amount of Au+ in the catalyst, and thus the cationic gold (Au+) was considered the main active species. Addition of water vapor to the feed gas promoted CO conversion to some degree, but the catalytic performance decreased rapidly due to the disproportionation of Au+ to Au3+ and Au-0 particularly for the catalyst that contained relatively large amounts of Au+ species.
关键词[WOS]: PRETREATMENT CONDITIONS ;  TEMPERATURE OXIDATION ;  CARBON-MONOXIDE ;  NANOPARTICLES ;  PERFORMANCE ;  AU/TIO2
语种: 英语
WOS记录号: WOS:000259341000019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140935
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Harbin Engn Univ, Coll Mat Sci & Chem Engn, Harbin 150001, Heilongjiang, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Ta Na,Zhang Milin,Li Juan,et al. Influence of chemical states of Au on CO oxidation over Au/CoCeOx catalyst[J]. CHINESE JOURNAL OF CATALYSIS,2008,29(8):777-782.
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