纳米孔炭负载MnO_x催化剂上苯甲醇氧化反应性能  

Nanoporous Carbon Supported MnO_x Catalysts for Oxidation of Benzyl Alcohol

作　　者：刘钢[1] 张秀艳[1] 徐跃[2] 张敏[1] 贾明君[1] 张文祥[1] 吴通好[1] 

机构地区：[1]吉林大学化学学院,吉林长春130021 [2]吉林大学分析测试中心,吉林长春130021

出　　处：《催化学报》2010年第8期1025-1030,共6页

基　　金：新世纪优秀人才支持计划;国家自然科学基金(20403006);高等学校博士学科点基金新教师项目(20090061120024)

摘　　要：以纳米孔炭(NC)为载体,采用浸渍法制备了一系列MnOx/NC催化剂,并用于以空气为氧源的苯甲醇液相氧化反应.通过X射线衍射、X射线光电子能谱、N2吸附-脱附和H2-程序升温还原等手段对催化剂进行了表征,考察了催化剂中Mn负载量和焙烧温度,以及反应条件等对反应性能的影响.结果表明,10%MnOx/NC催化剂的活性较高,反应4h后苯甲醇转化率可达80.4%;明显高于活性炭负载的MnOx催化剂.这主要归因于其表面存在大量高分散、且易于还原的Mn物种.A series of nanoporous carbon （NC） supported MnOx catalysts （MnOx/NC） prepared by conventional wet impregnation were characterized by X-ray diffraction,X-ray photoelectron spectroscopy,N2 adsorption-desorption,and H2-temperature programmed reduction.They were tested as catalysts for the oxidation of benzyl alcohol using air as the oxygen source.The influence of various factors such as Mn loading,calcination temperature,and reaction conditions on their catalytic performance was investigated.The 10%MnOx/NC catalyst exhibits relatively high activity （80.4% conversion of benzyl alcohol after 4 h reaction）,which is much higher than that of the catalyst prepared using conventional activated carbon as the support.The excellent catalytic activity of MnOx/NC can be mainly assigned to the formation of highly dispersed and easily reduced MnOx species on the surface of the NC support.

关 键 词：纳米孔炭 氧化锰 负载型催化剂 苯甲醇 氧化反应 苯甲醛 活性炭 

分 类 号：TQ203.2[化学工程—有机化工]