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题名: The state of active Au species in Au/Fe-O catalyst during CO catalytic oxidation
作者: Li, CY;  Shen, YN;  Hu, RS;  Jia, ML;  Sheng, SS
关键词: nanogold ;  iron oxide ;  supported catalyst ;  state of gold ;  carbon monoxide ;  catalytic oxidation
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2006-03-01
卷: 27, 期:3, 页:259-262
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: A series of Au/Fe-O catalysts have been prepared by a co-precipitation method from a Mixture of HAuCl4 (.) 4H(2)O and Fe(NO3)(3) (.) 9H(2)O. The most . These catalysts exhibit good catalytic activity for CO oxidation, active catalyst has 100% CO conversion at room temperature. The calcined catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). TEM observations reveal a homogenous distribution of gold particles between 10 and 15 nm on the iron oxide support. XPS results show that partially oxidized gold species exist in these samples. The difference in binding energies of Au 4f between these samples and bulk gold can be interpreted as that the Au 5d electrons partially flow into the Fe 3d orbit to some extent. So the attraction of nucleus in gold atoms is enhanced, resulting in the increase in the binding energies of Au 4f. This fact reflects that there exists an interaction between the gold nanoparticles and the support. For the CO oxidation on the 10 similar to 15 nm Au/Fe-O catalyst, the interaction between nanogold particles and iron oxide has more important influence on catalyst performance than the particle size of nanogold.
关键词[WOS]: VOLATILE ORGANIC-COMPOUNDS ;  LOW-TEMPERATURE OXIDATION ;  SUPPORTED GOLD CATALYSTS ;  AMBIENT-TEMPERATURE ;  GOLD/IRON OXIDE ;  COPRECIPITATION ;  HYDROGEN
语种: 英语
WOS记录号: WOS:000236753400014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140275
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.Inner Mongolia Univ, Coll Chem & Environm Sci, Hohhot 010022, Inner Mongolia, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, CY,Shen, YN,Hu, RS,et al. The state of active Au species in Au/Fe-O catalyst during CO catalytic oxidation[J]. CHINESE JOURNAL OF CATALYSIS,2006,27(3):259-262.
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