不同形貌CeO_(2)催化剂用于CO催化氧化研究  

CeO_(2)Catalysts with Different Morphologies for CO Catalytic Oxidation Study

作　　者：张璐 Zhang Lu(Huanggang Polytechnic College,Huanggang 438002 Hubei)

机构地区：[1]黄冈职业技术学院交通学院,湖北黄冈438002

出　　处：《黄冈职业技术学院学报》2023年第6期130-133,共4页Journal of Huanggang Polytechnic

摘　　要：为了探究具有不同形貌的CeO_(2)催化剂在CO催化氧化反应中的性能差异,对反应物中的有机配体富马酸的添加量进行调控,通过煅烧获得了片型CeO_(2)、哑铃型CeO_(2)和雪花型CeO_(2)。采用XRD、Raman和SEM测试对三种催化剂的微观结构和形貌进行分析。采用CO催化氧化装置评价了三种催化剂的性能,结合XPS和H2-TPR表征结果分析了雪花型CeO_(2)性能较为优异的主要原因。高结晶性的雪花型CeO_(2)含有丰富的氧空位和活性氧,结合其纳米片自组装的特殊形貌,在催化反应中表现出最低转化温度。In order to investigate the performance of CeO_(2) catalysts with different morphologies in CO catalytic oxidation reaction,the concentration of organic ligand fumaric acid in the reactants was regulated,and flake-type CeO_(2),dumbbell-type CeO_(2),and snowflake-type CeO_(2) were obtained by calcination.The micro-structures and morphologies of the three catalysts were analyzed by XRD,Raman,and SEM tests.The performance of the three catalysts was evaluated using a CO-catalyzed oxidation device.The main reason for the better performance of snowflake-type CeO_(2) was analyzed in combination with XPS and H2-TPR characterization results.The snowflake-type CeO_(2) with high crystallinity contains abundant oxygen vacancies and reactive oxygen species,which combined with its special morphology of nanosheet self-assembly,exhibits the lowest conversion temperature in the catalytic reaction.

关 键 词：有机配合物 过渡金属氧化物 二氧化铈 CO催化氧化 

分 类 号：TQ314.242[化学工程—高聚物工业]