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化工学报  2015 

沉淀剂对Cu-Mn-Ce复合氧化物催化剂结构和性能的影响

DOI: 10.11949/j.issn.0438-1157.20141930, PP. 2105-2111

Keywords: 催化燃烧,VOCs,Cu-Mn-Ce复合氧化物,共沉淀,催化剂,氧化,有机化合物

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Abstract:

为了避免柠檬酸溶胶-凝胶法制备过程中环境问题,采用共沉淀法制备了Cu-Mn-Ce复合氧化物催化剂,以催化燃烧甲苯为模型反应,考察了沉淀剂对Cu-Mn-Ce催化结构和性能的影响。结果表明,以NaOH作为沉淀剂催化剂效果最佳,其次为NH3·H2O、K2CO3、Na2C2O4。采用NaOH作为沉淀剂,氢氧化物前体在焙烧活化过程中更易使Cu、Mn离子进入CeO2的立方结构,形成具有缺陷结构的CeO2固溶体,从而提高了表面氧浓度和活动性,在燃烧反应中表现出更优异的催化特性。

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