| CuO对贵金属/CeO2/Al2O3催化剂的作用 |
| 摘要点击 1939 全文点击 1764 投稿时间：1999-04-25 |
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| 中文关键词 CuO 贵金属 催化剂 |
| 英文关键词 CuO precious metal catalysts |
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| 中文摘要 |
| 制备含少量贵金属Pt、Pd 的不同Cu 和Ce摩尔含量比(0:10,1:9,2:8)的催化剂,实验条件下加入CuO可以提高Pt催化剂的二效活性;加入Cu:Ce= 2:8 的CuO降低了Pd 催化剂的三效性能,然而Cu:Ce=1:9时可以改善Pd 催化剂的三效催化性能.通过结构分析,认为CuO的存在可以提高Pd 催化剂的比表面积,改善PdO的分散度。 |
| 英文摘要 |
| Catalysts which consist of Cu and Ce in different molar ratios and a small amount of precious metal were prepared.It was showed that CuO can promote oxidation activity of Pt/Cu-Ce/Al2O3 catalyst. The Pd/Cu-Ce/Al2O3 catalyst with Cu:Ce=1:9 has better three way catalyst activity and thermal resistance than those with other Cu:Ce molar ratios By BET,X-Ray Diffraction,X-Ray Photoelectron Spectra experiments,it was proved that a little additive of CuO increases specific surface areas of the catalysts and improves Pd dispersion of the Pd/Cu-Ce/Al2O3 catalyast. |
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