选择性溶解法原位合成MnO_2/LaMnO_3复合氧化物催化剂
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- 英文论文题名：Selective Dissolution for in Situ Preparation of the MnO_2/LaMnO_3 Oxide Composite Catalysts
- 论文作者：司文哲 ; 王羽 ; 彭悦 ; 李俊华
- 英文论文作者：Wenzhe Si ; Yu Wang ; Yue Peng ; Junhua Li ; School of Environment ; Tsinghua University
- 年：2016
- 作者机构：清华大学环境学院;
- 论文关键词：钙钛矿 ; 锰氧化物 ; 选择性溶解 ; 催化燃烧 ; 可挥发性有机物
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第十五分会：表界面结构调控与催化
- 语种：中文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十五分会 ; 表界面结构调控与催化
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：150k
- 原文格式：D
- 会议级别：全国
摘要
近年来我国挥发性有机污染物(VOCs)排放量逐年上升,年排放量超过2000万吨,居世界第一位。催化燃烧技术是控制VOCs排放最有效的方法。其中,开发高效稳定的锰氧化物催化剂已成为一个研究热点。二氧化锰/锰基钙钛矿(MnO_x/AMnO_3)复合催化剂同时具备了较高的催化活性与稳定性[1],但传统制备工艺相对复杂,MnO_x含量难以精确调控且难以保证高度分散。在最近的研究中,我们利用选择性溶解的方法[2],以适当浓度的硝酸处理LaMnO_3材料(LMO),破坏LMO表层及部分体相的La-O键,保留部分LMO钙钛矿结构,原位合成MnO_2/LMO复合结构催化剂。这种MnO_2/LaMnO_3材料对于甲苯催化燃烧的催化活性明显优于传统催化剂,且催化剂稳定性能优异。这为我们以后设计开发高效稳定VOCs催化燃烧催化剂提供了一个新思路。
MOx/ABO3 is a promising catalyst for the high-efficiency removal of volatile organic compounds.In this work,a MnO_2/LaMnO_3 composite catalyst was in situ prepared using selective dissolution method,in which partial La cations were selectively removed from LaMnO_3 material by acid treatment.The obtained MnO_2/LaMnO_3 sample expressed an excellent catalytic performance on toluene oxidation,which was better than those of some other metal oxides catalysts.In addition,the MnO_2/LaMnO_3 sample also exhibited good catalytic stability.All of these would provide new thought for the design of high-efficiency and stable catalysts for VOCs combustion.
MOx/ABO3 is a promising catalyst for the high-efficiency removal of volatile organic compounds.In this work,a MnO_2/LaMnO_3 composite catalyst was in situ prepared using selective dissolution method,in which partial La cations were selectively removed from LaMnO_3 material by acid treatment.The obtained MnO_2/LaMnO_3 sample expressed an excellent catalytic performance on toluene oxidation,which was better than those of some other metal oxides catalysts.In addition,the MnO_2/LaMnO_3 sample also exhibited good catalytic stability.All of these would provide new thought for the design of high-efficiency and stable catalysts for VOCs combustion.
引文
[1]Liu,Y.;Dai,H.;Deng,J.;Du,Y.;Li,X.;Zhao,Z.;Wang,Y.;Gao,B.;Yang,H.;Guo,G.Appl.Catal.,B,2013,140-141:493.
[2]Si,W.;Wang,Y.;Peng,Y.;Li,J.Angew.Chem.,Int.Ed.,2015,54(27):7954.
[2]Si,W.;Wang,Y.;Peng,Y.;Li,J.Angew.Chem.,Int.Ed.,2015,54(27):7954.