Insights into support effects on Ce-Zr-O mixed oxide-supported gold   catalysts in CO oxidation

doi:10.1016/S2095-4956(13)60013-3

CORC > 北京大学 > 化学与分子工程学院

	Insights into support effects on Ce-Zr-O mixed oxide-supported gold catalysts in CO oxidation
	Zhang, Hongpeng ; Liu, Haichao
刊名	journal of energy chemistry
	2013
关键词	gold catalyst ceria-zirconia support CO oxidation oxygen storage capacity support effect CATALYTICALLY ACTIVE GOLD AU/ZRO2 CATALYST AU CATALYSTS NANOPARTICLES MECHANISM AU(PPH3)(NO3) HYDROXIDE CLUSTERS SITES FTIR
DOI	10.1016/S2095-4956(13)60013-3
英文摘要	Au/Ce1-xZrxO2 catalysts (x = 0-0.8) were prepared by a deposition-precipitation method using Ce1-xZrxO2 nanoparticles as supports with variable Ce and Zr contents. Their structures were characterized by complimentary means such as X-ray diffraction, Raman, scanning transmission electron microscopy and X-ray photoelectron spectroscopy (XPS). These Au catalysts possessed similar sizes and crystalline phases of Ce1-xZrxO2 supports as well as similar sizes and oxidation states of Au nanoparticles. The oxidation state of Au nanoparticles was dominated by Au especially in CO oxidation. Their activities were examined in CO oxidation at different temperatures in the range of 303-333 K. The CO oxidation rates normalized per Au atoms increased with the increasing Ce contents, and reached the maximum value over Au/CeO2. Such change was in parallel with the change in the oxygen storage capacity values, i.e. the amounts of active oxygen species on Au/Ce1-xZrxO2 catalysts. The excellent correlation between the two properties of the catalysts suggests that the intrinsic support effects on the CO oxidation rates is related to the effects on the adsorption and activation of O-2 on Au/Ce1-xZrxO2 catalysts. Such understanding on the support effects may be useful for designing more active Au catalysts, for example, by tuning the redox properties of oxide supports.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000318050700014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Applied; Chemistry, Physical; Energy & Fuels; Engineering, Chemical; SCI(E); EI; 中国科学引文数据库(CSCD); 7; ARTICLE; 1; 98-106; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150831]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhang, Hongpeng,Liu, Haichao. Insights into support effects on Ce-Zr-O mixed oxide-supported gold catalysts in CO oxidation[J]. journal of energy chemistry,2013.
APA	Zhang, Hongpeng,&Liu, Haichao.(2013).Insights into support effects on Ce-Zr-O mixed oxide-supported gold catalysts in CO oxidation.journal of energy chemistry.
MLA	Zhang, Hongpeng,et al."Insights into support effects on Ce-Zr-O mixed oxide-supported gold catalysts in CO oxidation".journal of energy chemistry (2013).