Ce_(0.63)Zr_(0.37)Mn_xO_2复合氧化物在CH_4选择性催化还原NO反应中的研究  

Study of Ce_(0.63)Zr_(0.37)Mn_XO_2 compound oxides on selective catalytic reduction of NO by CH_4

作　　者：房华[1] 蔡黎[1] 刘萍[1] 赵明[1] 张丽娟[1] 龚茂初[1] 陈耀强[1] 

机构地区：[1]四川大学化学学院,四川成都610064

出　　处：《化学研究与应用》2006年第6期676-679,共4页Chemical Research and Application

基　　金：国家自然科学重点工作基金(20333030);国家自然科学基金资助项目(20273043)

摘　　要：以Ce0.63Zr0.37MnxO2复合氧化物(OSM)为载体,Pt为活性组分,制备Pt质量百分含量为1%的催化剂。考察了OSM中Mn含量对CH4催化还原NO反应的性能,并利用XRD和H2-TPR对催化剂进行了表征。结果表明Pt/OSM催化剂在有氧条件下对CH4催化还原NO具有较好的催化活性,Mn含量为10%和15%的OSM制备的催化剂活性最好。XRD结果表明,Ce0.63Zr0.37MnxO2复合氧化物以固熔体形式存在,且Pt高度分散于载体上。H2-TPR结果表明,Pt/OSM2和Pt/OSM3催化剂具有较强的可还原性能,而Pt/OSM1和Pt/OSM4催化剂的可还原性能较弱。Ce0.63Zr0.37MnxO2 compound oxided （OSM） was prepared by co - precipitation. The catalysts of Pt/OSM were prepared by impregnation with platinum loading 1wt%. The catalysts were characterized by XRD and H2 - TPR,and were investigated for the selective catalytic reduction of NO by methane. The result revealed that Pt/OSM have high activities for the catalytic reduction of NO by methane in the presence of O2. XRD revealed that platinum was highly dispersed on OSM. H2 - TPR revealed that Pt/OSM have high reductive.

关 键 词：Ce0.63Zr0.37MnxO2复合氧化物(OSM) Pt CH4 NO 选择性催化还原 

分 类 号：O643.36[理学—物理化学]