| 溶剂化金属原子浸渍法制备Pd-Cu/γ-Al2O3低温CO氧化催化剂 |
| Preparation of Pd-Cu/γ-Al2O3 Catalysts for Low- Temperature CO Oxidation by Solvated Metal Atom Impregnation Method |
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| 摘要: |
| 关键词: 溶剂化金属原子 Pd-Cu催化剂 低温CO氧化 |
| 基金项目: |
| Abstract: Nano-particle Pd/γ-Al2O3 monometallic and Pd-Cu/γ-Al2O3 bimetallic catalysts were prepared by solvated metal atom impregnation (SMAI) method. The results of XRD measurement indicated that Pd- Cu alloy was formed in the bimetallic catalysts and the crystalline particle size of the alloy increased as Cu contents increased with av-erage diameters < 6.0nm for all the samples. XPS and Auger spectra showed that Pd was in zero- valent state, Cu existed mainly in zero- valent state and partially in monovalent state Cu+. The Pd/γ-Al2O3 and Pd-Cu/γ-Al2O3 catalysts exhibited higher activity for CO oxidation at low temperature. The activity of Pd-Cu/γ-Al2O3 bimetallic catalyst was higher than that of Pd/γ-Al2O3 monometallic catalyst. The Pd-Cu/γ-Al2O3 catalyst with Pd/Cu atomic ratio of 1∶1 showed the highest activity. |
| Keywords: solvated metal atom palladium-copper catalyst low-temperature carbon monoxide oxidation |
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| 吴世华,李保庆,张守民,黄唯平,邱晓航,郑修成.溶剂化金属原子浸渍法制备Pd-Cu/γ-Al2O3低温CO氧化催化剂[J].无机化学学报,2002,18(8):811-814. |
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