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Cu掺杂对LaMnO3催化剂的结构和催化氧化性能的影响
  • ISSN号：1000-6818
  • 期刊名称：《物理化学学报》
  • 时间：0
  • 分类：O643[理学—物理化学;理学—化学]
  • 作者机构：[1]清华大学化学系,北京100084
  • 相关基金：国家自然科学基金（20433010,20571047）资助项目
作者： BULGAN, G., 滕飞[1], 梁淑惠[1], 姚文清[1], 朱永法[1]
关键词： 非晶态配合物, 钙钛矿型, 催化剂, 铜掺杂, 催化氧化化学发光, CO, CH4, Amorphous heteronuclear complex, Perovskite, Catalyst, Cu dopant, Cataluminescence, CO, CH4
中文摘要：

采用非晶态多核配合的方法合成了La（1-x）CuxMnO3（x=0、0.05、0.1、0.2、0.3、0.4、0.5）系列催化剂,并用X射线衍射（XRD）、透射电镜（TEM）、比表面测定仪（BET）等手段对催化剂的微观结构进行了表征.研究了Cu掺杂对钙钛矿结构及其对CO催化氧化发光性能及催化氧化CO、CH4性能的影响规律.结果表明,当x≤0.1时,Cu掺杂仍可形成单相的钙钛矿结构;当x〉0.1时,过量掺杂的Cu以CuO杂相存在.Cu掺杂可改善La（1-x）CuxMnO3催化剂对CO和CH4的催化氧化活性.经700℃焙烧3h制备的La（0.9）Cu（0.1）MnO3催化剂具有最高CO催化氧化活性（T（100%）=170℃）,该结果与CO催化氧化发光结果一致.而La（0.95）Cu（0.05）MnO3催化剂对CH4的催化氧化活性最高（T（95%）= 705℃）.

英文摘要：

La（1-x）CuxMnO3（x=0,0.05,0.1,0.2,0.3,0.4,0.5）catalysts were synthesized by amorphous heteronuclear complexing method.The catalysts were characterized by XRD,TEM,and N2 adsorption isotherms.The cataluminescence （CTL）response to CO and the activities in the oxidation of CO and CH4 over the catalysts were investigated.XRD analysis indicated that the single-phase perovskite crystals were formed at x≤0.1,but perovskite and CuO phases coexisted at x〉0.1.The catalytic activities of La（1-x）CuxMnO3 catalysts were superior to those of LaMnO3 catalysts for CO oxidation.La（0.9）Cu（0.1）MnO3（calcined at 700℃for 3 h）catalyst showed the highest catalytic activity for CO oxidation （T（100%）=170℃）,which agreed well with the catahiminescence results.However,La（0.95）Cu（0.05）MnO3 catalyst showed the highest catalytic activity for CH4 oxidation（T（95%）=705℃）.

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期刊信息
  • 《物理化学学报》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:北京大学化学与分子工程学院承办
  • 主编：刘忠范
  • 地址：北京大学化学楼
  • 邮编：100871
  • 邮箱：whxb@pku.edu.cn
  • 电话：010-62751724
  • 国际标准刊号：ISSN：1000-6818
  • 国内统一刊号：ISSN：11-1892/O6
  • 邮发代号:82-163
  • 获奖情况:
  • 中文核心期刊
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,荷兰文摘与引文数据库,美国科学引文索引（扩展库）,英国科学文摘数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,英国英国皇家化学学会文摘,中国北大核心期刊（2000版）
  • 被引量:24781