Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions | |
Shi F(石峰)![]() ![]() ![]() ![]() ![]() | |
刊名 | Journal of Catalysis
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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. |
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