Carbon monoxide oxidation over CuO/CeO2 catalysts
Carbon monoxide oxidation over CuO/CeO2 catalysts
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DOI：
10.1016/j.cattod.2004.06.040
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发表时间：
2004-09
期刊：
影响因子：
5.3
通讯作者：
Xiaolan Tang;Baocai Zhang;Yong Li;Yide Xu;Q. Xin;Wenjie Shen
中科院分区：
文献类型：
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作者：
Xiaolan Tang;Baocai Zhang;Yong Li;Yide Xu;Q. Xin;Wenjie Shen
采用共沉淀法、沉积-沉淀法和浸渍法制备了CuO/CeO 2催化剂，并对催化剂的CO氧化反应性能进行了研究。结果表明，CuO/CeO 2催化剂的催化性能受制备路线的影响较大，导致催化剂的氧化还原性能和铜物种的分散性存在显著差异。CuO/CeO 2催化剂在较低温度下的氧化还原能力在CO氧化反应中起重要作用。共沉淀法制备的催化剂在85°C时具有最高的CO氧化活性和CO总转化率。采用XRD、TPR、循环伏安和XPS等测试手段对CuO/CeO 2催化剂的结构特征和氧化还原特性进行了比较研究。铜物种的分散性和铜物种与氧化铈之间的相互作用程度的差异决定了可逆氧化还原性质，从而决定了催化性能。
CuO/CeO2catalysts prepared by co-precipitation, deposition-precipitation and impregnation methods were extensively investigated for CO oxidation reaction. It was shown that the catalytic behaviors of CuO/CeO2catalysts greatly depended on the preparation routes, which caused significant differences in the redox properties and the dispersion of copper species. The remarkable redox ability of CuO/CeO2at lower temperatures was found to play an essential role in CO oxidation reaction. The catalysts prepared by co-precipitation exhibited the highest catalytic activity in CO oxidation with CO total conversion at 85°C. The structural characters as well as the redox features of CuO/CeO2catalysts were comparatively investigated by XRD, TPR, cyclic voltammetry and XPS measurements. The discrepancies in the dispersion of copper species and the degree of interaction between copper species and ceria determined the reversible redox properties, and consequently the catalytic performance.