Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions

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	Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions
	Shi F(石峰); Deng YQ(邓友全); Deng YQ(邓友全); Zhou F(周锋); Qi XJ(亓秀娟)
刊名	Journal of Catalysis
	2010
卷号	274 页码:1-10
关键词	CO oxidation Pt catalyst Pd catalyst Kinetic measurements Strong metal–support interaction (SMSI) effect Oxygen vacancy H2–O2 titration Time-resolved CO titration
ISSN号	0021-9517
通讯作者	邓友全
中文摘要	A series of FeOx- and Al2O3-supported Pt, Pd catalysts (0.23–2.1%) were prepared in this study. Pt/FeOx exhibited high CO oxidation activity with turnover frequency of 151 10 3 s 1 (1% CO balanced with air, atmospheric pressure, 27 C). A systematical study of FeOx- and Al2O3-supported Pt, Pd catalysts by means of X-ray photoelectron spectroscopy, X-ray diffraction, high-resolution transmission electron microscopy, temperature-programmed reduction, H2–O2 titration, and time-resolved CO titration is reported. From 7% to 39% of Fe3+ was reduced to Fe2+ over Fe(OH)x-supported Pd and Pt catalysts, accompanied by Pd, Pt hydrogenation and hydroxyl loss, and a large amount of oxygen vacancies were proposed to be produced. Results of H2–O2 titration and time-resolved CO titration showed that a large amount of oxygen adsorbed onto FeOx support in the presence of Pt, Pd. This made CO oxidations over Pt/FeOx, Pd/FeOx proceed over two adjacent but different active sites (Pt, Pd for CO and FeOx for oxygen) with low apparent activation energies (30–34 kJ/mol), which accounted for their high activity in low-temperature CO oxidation.
学科主题	物理化学
收录类别	SCI
资助信息	the National Sciences Foundation of China (No. 20773146)
语种	英语
WOS记录号	WOS:000281320700001
公开日期	2012-11-14
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/2205]
专题	兰州化学物理研究所_绿色化学研究发展中心
通讯作者	Deng YQ(邓友全); Deng YQ(邓友全)
推荐引用方式 GB/T 7714	Shi F,Deng YQ,Deng YQ,et al. Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions[J]. Journal of Catalysis,2010,274:1-10.
APA	石峰,邓友全,邓友全,周锋,&亓秀娟.(2010).Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions.Journal of Catalysis,274,1-10.
MLA	石峰,et al."Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions".Journal of Catalysis 274(2010):1-10.