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Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions
文献类型：期刊论文
| 作者 | Shi F(石峰) ; Deng YQ(邓友全); Deng YQ(邓友全); Zhou F(周锋); Qi XJ(亓秀娟)
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| 刊名 | Journal of Catalysis
 |
| 出版日期 | 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 |
| 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. |
入库方式： OAI收割
来源：兰州化学物理研究所
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