Remarkable effects of hydroxyl species on low-temperature CO (preferential) oxidation over Ir/Fe(OH)(x) catalyst

	Remarkable effects of hydroxyl species on low-temperature CO (preferential) oxidation over Ir/Fe(OH)(x) catalyst
	Lin, Jian 1; Qiao, Botao 1; Li, Lin 1; Guan, Hongling 1,2; Ruan, Chongyan 1,2; Wang, Aiqin 1; Zhang, Wansheng 1; Wang, Xiaodong 1; Zhang, Tao 1
刊名	journal of catalysis
	2014-11-01
卷号	319 页码:142-149
关键词	Catalysis CO oxidation Iridium Ferrous iron Hydroxyl species
英文摘要	fe(oh)(x)-supported noble metal catalysts exhibited good performance in low-temperature co oxidation or co preferential oxidation (prox), which usually resulted from the high reducibility of fe(oh)(x,) however, we found here that the use of fe(oh) x promoted the formation of oh species during prox over ir/fe(oh)(x) catalysts, which not only greatly lowered the temperature for 100% co conversion, even to room temperature, but also improved the stability. these oh species originated from the reaction between the adsorbed o on fe2+ sites and the adsorbed h on ir sites. they changed the reaction route for the oxidation of co through adsorbed co and oh with lower activation energy (ea: similar to 5.2 kj/mol) rather than through adsorbed co and o (ea: similar to 15.4 kj/mol). with further time-resolved mass spectroscopy and diffuse reflectance infrared spectroscopy, the oh species, prior to the adsorbed 0, were proved to react with co directly. (c) 2014 elsevier inc. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; engineering, chemical
研究领域[WOS]	chemistry ; engineering
关键词[WOS]	carbon-monoxide ; selective oxidation ; hydrogen prox ; gold catalysts ; platinum nanoparticles ; h-2-rich stream ; metal-oxides ; support ; adsorption ; h-2
收录类别	SCI
语种	英语
WOS记录号	WOS:000344437400015
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/145648]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lin, Jian,Qiao, Botao,Li, Lin,et al. Remarkable effects of hydroxyl species on low-temperature CO (preferential) oxidation over Ir/Fe(OH)(x) catalyst[J]. journal of catalysis,2014,319:142-149.
APA	Lin, Jian.,Qiao, Botao.,Li, Lin.,Guan, Hongling.,Ruan, Chongyan.,...&Zhang, Tao.(2014).Remarkable effects of hydroxyl species on low-temperature CO (preferential) oxidation over Ir/Fe(OH)(x) catalyst.journal of catalysis,319,142-149.
MLA	Lin, Jian,et al."Remarkable effects of hydroxyl species on low-temperature CO (preferential) oxidation over Ir/Fe(OH)(x) catalyst".journal of catalysis 319(2014):142-149.