甲苯和一氧化碳氧化用介孔LaFeO_3催化剂(英文)  

Mesoporous LaFeO_3 catalysts for the oxidation of toluene and carbon monoxide

作　　者：高宝族[1] 邓积光[1] 刘雨溪[1] 赵振璇[1] 李欣尉[1] 王媛[1] 戴洪兴[1] 

机构地区：[1]北京工业大学环境与能源工程学院化学化工系催化化学与纳米科学研究室,北京100124

出　　处：《催化学报》2013年第12期2223-2229,共7页

基　　金：supported by the National Natural Science Foundation of China(21103005,21077007);the Natural Science Foundation of Beijing Municipality(KZ200610005004);the Discipline and Postgraduate Education Foundation(PXM2013_014204_07_000261 and 005000542513551);the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality(PHR201107104)~~

摘　　要：以KIT-6和二氧化硅纳米球为硬模板制备了比表面积分别为138和65 m2/g的正交相蠕虫状介孔LaFeO3催化剂LFO-1和LFO-2.在空速为20000 mL/(g劒h)的条件下,LFO-1样品显示出最高的催化活性:对于CO氧化反应,T50%和T90%分别为155和180 oC;对于甲苯氧化反应,T50%和T90%分别为200和253 oC.该样品优异的催化性能与它具有较大的比表面积、较高的氧吸附物种浓度、较好的低温还原性以及良好的蠕虫状介孔结构有关.Wormhole-like orthorhombic LaFeO3 catalysts (LFO-1 and LFO-2) were prepared using the KIT-6 and SiO2 nanospheres as template, respectively. LFO-1 showed better catalytic activity with T50%and T90%of 155 and 180 °C for CO oxidation, and of 200 and 253 °C for toluene oxidation at 20000 mL/(g·h). The excellent catalytic performance was associated with its larger surface area (138 m2/g), higher adsorbed oxygen concentration, and better low-temperature reducibility as well as a wormhole-like mesoporous structure.

关 键 词：蠕虫状介孔LaFeO3 钙钛矿型氧化物 硬模板合成法 一氧化碳氧化 甲苯氧化 

分 类 号：O643.36[理学—物理化学]