CuCe-O_x催化剂表面物种对CO催化氧化性能影响  

Effect of surface species on the catalytic activity of CuCe-O_x catalyst in the CO catalytic oxidation

作　　者：李粉吉 徐利斯 宋忠贤 张秋林[2] 夏福婷[1,3,4] 庞鹏飞 彭金辉[3,4] LI Fen-ji;XU Li-si;SONG Zhong-xian;ZHANG Qiu-lin;XIA Fu-ting;PANG Peng-fei;PENG Jin-hui(Key Laboratory of Resource Clean Conversion in Ethnic Regions,Education Department of Yunnan, Yunnan Minzu University,Kunming 650500, China;Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093,China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology, Kunming 650093, China;Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093,China)

机构地区：[1]云南民族大学云南省高校民族地区资源清洁转化重点实验室,云南昆明650500 [2]昆明理工大学环境科学与工程学院,云南昆明650093 [3]昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室,云南昆明650093 [4]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《云南民族大学学报（自然科学版）》2019年第1期20-25,共6页Journal of Yunnan Minzu University:Natural Sciences Edition

基　　金：国家自然科学基金(21567030;11447191);国家重点基础研究计划973项目(2014CB643404);云南省科技厅应用基础研究计划青年项目(2013FD033)

摘　　要：选取不同沉淀剂采用共沉淀法制备了CuCe-Ox复合氧化物催化剂.考察了沉淀剂对其CO催化氧化性能的影响.研究表明以氨水为沉淀剂的催化剂CO氧化活性最佳,它与CuCe-Ox催化剂具有较多的Ce^(3+)以及CuO物种有关.此外,采用氨水作为沉淀剂可促进CuO的生成,这是CO催化氧化的主要活性位点.In this paper, CuCe-Ox composite oxide catalysts are prepared by the co-precipitation method with different precipitants. The effect of the precipitants on its CO oxidation performance is investigated. The study shows that the catalyst with ammonia as the precipitant has the best CO oxidation activity, which is related to Cu-Ce-Ox catalysts with more Ce^3+ and CuO species. In addition, the use of ammonia as a precipitant can promote the formation of CuO, which is the main active site for CO oxidation.

关 键 词：CuCe-Ox催化剂 CO的催化氧化 沉淀剂 Ce^3+和CuO物种 

分 类 号：O643[理学—物理化学]