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过渡金属修饰对铜铈催化剂在选择性脱除CO反应中催化性能的影响
引用本文:刘志刚,周仁贤,郑小明.过渡金属修饰对铜铈催化剂在选择性脱除CO反应中催化性能的影响[J].浙江大学学报(理学版),2009,36(3):299-303.
作者姓名:刘志刚  周仁贤  郑小明
作者单位:1. 浙江大学催化研究所,浙江,杭州,310028;湖南大学化学化工学院,湖南,长沙,410082
2. 浙江大学催化研究所,浙江,杭州,310028
摘    要:过渡金属(Mn、Fe、Ni、Zn、Co)修饰对铜铈催化剂的催化性能有明显的影响.Fe和Co的修饰对铜铈催化剂的CO氧化活性有较明显的促进作用,在110℃时,CO的转化率即达到99%;尤其Co的修饰增加了铜铈催化剂上CO转化率为99%的温度‘窗口’宽度约30℃,而Mn、Ni和Zn的修饰对铜铈催化剂的CO氧化活性则有一定的抑制作用.但不同过渡金属修饰对铜铈催化剂的氧化选择性均有明显的提高.

关 键 词:铜铈催化剂  过渡金属  修饰  CO  选择性脱除

Influence of transition metals doping on the catalytic performance of CuO-CeO_2 catalysts for the preferential oxidation of CO in excess hydrogen.
LIU Zhi-gang,ZHOU Ren-xian,ZHENG Xiao-ming.Influence of transition metals doping on the catalytic performance of CuO-CeO_2 catalysts for the preferential oxidation of CO in excess hydrogen.[J].Journal of Zhejiang University(Sciences Edition),2009,36(3):299-303.
Authors:LIU Zhi-gang  ZHOU Ren-xian  ZHENG Xiao-ming
Institution:1.Institute of Catalysis;Zhejiang University;Hangzhou 310028;China;2.School of Chemistry and Chemical Engineering;Hunan University;Changsha 410082;China
Abstract:Doping of different transition metals (Mn, Fe, Ni, Zn, Co) has an evident influence on the catalytic performance of CuO-CeO2 catalysts for the preferential oxidation of CO in excess hydrogen. As for Fe and Co, the doping enhances the catalytic activity of CuO-CeO2 catalysts for preferential oxidation of CO in excess hydrogen. For example, the CO conversion over the above catalysts was as high as 99% at 110 ℃. Especially, the doping of Co widens the temperature window of CO conversion of 99% over CuO-CeO2 catalysts by 30 ℃. For Mn, Ni and Zn, the doping depresses the catalytic activity of CuO-CeO2 catalysts for the preferential oxidation of CO in excess hydrogen. However, the doping of transition metals markedly improves the selectivity of CuO-CeO2 catalysts in preferential oxidation of CO in excess hydrogen.
Keywords:CO
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