Microstructured Au/Ni-fiber catalyst for low-temperature gas-phase alcohol oxidation: Evidence of Ni2O3-Au+ hybrid active sites

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	Microstructured Au/Ni-fiber catalyst for low-temperature gas-phase alcohol oxidation: Evidence of Ni2O3-Au+ hybrid active sites
	Zhao, Guofeng; Huang, Jun; Jiang, Zheng; Zhang, Shuo; Chen, Li; Lu, Yong
	2013
Source Publication	APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN	0926-3373
Volume	140 Pages:CONCATENATE(Sheet1!I214,-Sheet1!J214)
Abstract	Microfirous-structured Au/Ni-fiber catalysts prepared by Au galvanic deposition method are active and selective for the gas-phase oxidation of alcohols. The nature of their excellent low-temperature activity is explored especially by means of X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge structure (XANES). An interesting NiO@Au ensemble nanostructure (i.e., partial coverage of Au particles with NiO segments) was clearly identified, which is governing the high low-temperature activity. XPS and XANES studies indicate that the NiO@Au ensembles provide a unique synergistic effect, inducing a high surface concentration of Ni2O3-Au+ hybrid active sites. The Ni2O3 specimens not only promote the formation of Au+ cations and stabilize them but also serve as active O species reservoir. It is also proposed that O-2 is activated on the oxygen vacancy of Ni2O3 and then the adsorbed O atoms spill over onto Au+ cations to react with alcohols. (C) 2013 Elsevier B.V. All rights reserved.
Indexed By	SCI
Language	英语
Funding Project	应物所项目组
WOS ID	WOS:000321991300029
Citation statistics	Cited Times:24[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/13824
Collection	中科院上海应用物理研究所2011-2020年
Recommended Citation GB/T 7714	Zhao, Guofeng,Huang, Jun,Jiang, Zheng,et al. Microstructured Au/Ni-fiber catalyst for low-temperature gas-phase alcohol oxidation: Evidence of Ni2O3-Au+ hybrid active sites[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2013,140:CONCATENATE(Sheet1!I214,-Sheet1!J214).
APA	Zhao, Guofeng,Huang, Jun,Jiang, Zheng,Zhang, Shuo,Chen, Li,&Lu, Yong.(2013).Microstructured Au/Ni-fiber catalyst for low-temperature gas-phase alcohol oxidation: Evidence of Ni2O3-Au+ hybrid active sites.APPLIED CATALYSIS B-ENVIRONMENTAL,140,CONCATENATE(Sheet1!I214,-Sheet1!J214).
MLA	Zhao, Guofeng,et al."Microstructured Au/Ni-fiber catalyst for low-temperature gas-phase alcohol oxidation: Evidence of Ni2O3-Au+ hybrid active sites".APPLIED CATALYSIS B-ENVIRONMENTAL 140(2013):CONCATENATE(Sheet1!I214,-Sheet1!J214).

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