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用水热法、共沉淀法、柠檬酸络合物法和多元醇法分别合成了铈钴摩尔比1∶1的Co3O4-CeO2催化剂,并用XRD、TPR、TPD、FT-IR、BET等对催化剂的晶相结构、还原性能、吸附性能及比表面积等进行了表征.结果表明,制备方法对Co3O4-CeO2催化剂的催化性能具有较大的影响,其中多元醇法制备的催化剂能促进Co3O4和CeO2的相互作用,该催化剂还原温度较低、CO脱附面积较大,在140℃温度下,CO的转化率达到90%以上.
The Co3O4-CeO2 catalysts with cerium and cobalt molar ratio of 1: 1 were synthesized by hydrothermal method, coprecipitation method, citric acid complex method and polyol method, respectively. The catalytic performance of the catalysts was characterized by XRD, TPR, TPD, FT-IR and BET. The results show that the preparation method has a great influence on the catalytic performance of Co3O4-CeO2 catalyst, in which the catalyst prepared by the polyol method can promote the interaction between Co3O4 and CeO2 The catalyst has a lower reduction temperature and a larger CO desorption area, and the conversion rate of CO reaches more than 90% at a temperature of 140 ° C.