| Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions | |
| Department | 绿色化学研究发展中心 |
Liu LQ(刘乐全); Zhou F(周锋) ; Wang LG(王利国); Qi XJ(亓秀娟); Shi F(石峰); Deng YQ(邓友全)
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| 2010 | |
| Source Publication | Journal of Catalysis
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| ISSN | 0021-9517 |
| Volume | 274Pages:1-10 |
| Abstract | 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. |
| Keyword | Co Oxidation Pt Catalyst Pd Catalyst Kinetic Measurements Strong Metal–support Interaction (Smsi) Effect Oxygen Vacancy H2–o2 Titration Time-resolved Co Titration |
| Subject Area | 物理化学 |
| Funding Organization | the National Sciences Foundation of China (No. 20773146) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 绿色催化课题 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/2205 |
| Collection | 绿色化学研究发展中心 |
| Corresponding Author | Deng YQ(邓友全) |
| Recommended Citation GB/T 7714 | Liu LQ,Zhou F,Wang LG,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 | 刘乐全,周锋,王利国,亓秀娟,石峰,&邓友全.(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 | 刘乐全,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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