| Low-temperature prepared highly effective ferric hydroxide supported gold catalysts for carbon monoxide selective oxidation in the presence of hydrogen | |
| Department | 绿色化学与催化研发中心 |
Qiao BT(乔波涛); Zhang J(张娟); Liu LQ(刘乐全); Deng YQ(邓友全)
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| 2008 | |
| Source Publication | Applied Catalysis A: General
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| ISSN | 0926-860X |
| Volume | 340Pages:220-228 |
| Abstract | Ferric hydroxide supported Au catalysts prepared with co-precipitation method at room temperature without any heat treatment hereafter exhibited high catalytic activity and selectivity for CO oxidation in air and CO selective oxidation in the presence of H2. With calcination temperature rising, both activity and selectivity decreased. X-ray Photoelectron Spectra (XPS) indicated that Au existed as Au0 and Au+ in the catalyst without heat treatment and even after being calcined at 200 ℃, while after being calcined at 400 ℃, Au existed as Au0 completely. X-ray Diffraction (XRD) and High Resolution Transmission Electron Microscopic (HRTEM) investigations indicated that both the supports and Au species were highly dispersed as nano or sub-nano particles even after being calcined at 200 ℃, but after being calcined at 400 ℃ the supports transformed to crystal Fe2O3 with typical diameter of 30 nm and Au species aggregated to nano-particles with typical diameter of 2–4 nm. HRTEM investigations also suggested that the supports calcined at 200 ℃ were composed of amorphous ferric hydroxide and crystal ferric oxide. Results of computer simulation (CS) showed that O2 was adsorbed on Au crystal cell and then were activated, which should be the key factor for the subsequent reaction. It also suggested that O2 species were more easily adsorbed on Au+ than on Au0, indicating that higher positive charge of the Au species possessed the higher activity for CO oxidation. |
| Keyword | Gold Catalyst Co Selective Oxidation Preparation Uncalcined Low-temperature |
| Subject Area | 物理化学 |
| 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/362003/3644 |
| Collection | 绿色化学研究发展中心 |
| Corresponding Author | Deng YQ(邓友全) |
| Recommended Citation GB/T 7714 | Qiao BT,Zhang J,Liu LQ,et al. Low-temperature prepared highly effective ferric hydroxide supported gold catalysts for carbon monoxide selective oxidation in the presence of hydrogen[J]. Applied Catalysis A: General,2008,340:220-228. |
| APA | 乔波涛,张娟,刘乐全,&邓友全.(2008).Low-temperature prepared highly effective ferric hydroxide supported gold catalysts for carbon monoxide selective oxidation in the presence of hydrogen.Applied Catalysis A: General,340,220-228. |
| MLA | 乔波涛,et al."Low-temperature prepared highly effective ferric hydroxide supported gold catalysts for carbon monoxide selective oxidation in the presence of hydrogen".Applied Catalysis A: General 340(2008):220-228. |
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