物理化学学报 >> 1992, Vol. 8 >> Issue (05): 630 -635 .doi: 10.3866/PKU.WHXB19920511

研究论文 上一篇    下一篇

La-Mn-Ni-O催化剂组成、结构、还原性能及氧化活性

杜少斌; 王瑾; 马福泰; 郑洪元; 楼辉; 敬承衡   

  1. 浙江大学化学系,杭州 610027;杭州大学化学系;昆明工学院基础部
  • 收稿日期:1991-03-11 修回日期:1991-12-27 发布日期:1992-10-15
  • 通讯作者: 杜少斌

Correlation of Composition、Crystal Structure、Reducibility and Catalytic Oxidation Activity on La-Mn-Ni-O System

Du Shao-Bin; Wang Jin; Ma Fu-Tai; Zheng Hong-Yuan; Lou Hui; Jing Cheng-Heng   

  1. Department of Chemistry, Zhejiang University, Hangzhou 310027; Department of Chemistry, Hangzhou University, Hangzhou 310028; Elementary Department, Kunming Engineering College, Kunming 650093
  • Received:1991-03-11 Revised:1991-12-27 Published:1992-10-15
  • Contact: Du Shao-Bin

摘要: 用硝酸盐分解法合成了LaMn_(1-x)Ni_xO_3(0≤2≤1.0), 研究了组成、晶体结构及其与还原性能、CO和CH_3OH催化氧化活性的关系。XRD证实在0.0≤x≤1.0范围内, 本体系都生成单一钙钛矿结构: 0.0≤x≤0.4, 0.8

关键词: 钙钛矿, 还原稳定性, 晶体结构, 对称性

Abstract: The correlation of the composition, structure, IR, TPR and catalytic activity for CO and CH_3OH oxidation on LaMn_(1-x)Ni_xO_3 (0.0≤x≤1.0) has been studied. The single crystalline phase was perovskite in the range of 0.0≤x≤1.0; samples for 0.0≤x≤0.4 and x=1.0 were rhombohedral, and cubic with 0.5≤x≤0.8, and the samples with x=0.4 and 0.8 were close to the transitional region of rhombohedral to cubic or cubic to rhombohedral. IR and TPR studies proved that there was interaction between Mn and Ni in the B site of ABO_3. The catalytic activity of the oxides was related to the symmetry of the crystal, the higher the symmetry, the lower the activity.

Key words: Perovskite, Reductive stability, Crystal structure, Symmetry