高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (5): 790.

• 论文 • 上一篇    下一篇

在Ni系ABO3和A2BO4型复合氧化物催化剂上NO吸附性能的研究

赵震, 杨向光, 王学中, 吴越   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1995-06-06 出版日期:1996-05-24 发布日期:1996-05-24
  • 通讯作者: 吴越
  • 作者简介:赵震,男,30岁,博士研究生.
  • 基金资助:

    国家自然科学基金

Studies on the Adsorption Property of No on the Ni-based MixedOxide Catalysts with Perovskite-like(ABO3 and A2BO4)Structure

ZHAO Zhen, YANG Xiang-Guang, WANG Xue-Zhong, WU Yue   

  1. Changchun Institute of Applied Chemistry, Academic Sinica, Changchun 130022
  • Received:1995-06-06 Online:1996-05-24 Published:1996-05-24

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摘要： 合成了具有钙钛石和类钙钛石结构的复合氧化物LaNiO3、La0.1Sr0.9NiO3、La2NiO4和LaSrNiO4.考察了它们对NO的吸附和NO直接分解反应的催化性能;结合比表面测定、化学分析、XRD和NO-TPD对催化剂的表征结果,探讨了该系列复合氧化物对NO的吸附规律。

关键词: 钙钛石复合氧化物, NO吸附, 氧空位, 金属离子的价态

Abstract: The mixed oxides LaNiO3, La0.1Sr0.9NiO3, La2NiO4 and LaSrNiO4 with perovskite(ABO3)and related(A2BO4)structures were prepared and the adsorption property for NO and the catalytic activity for NO decomposition over these oxidse were also tested.The catalysts were characterized by means of BET surface measurement,chemical analysis, NO-TPDetc..It was shown that the adsorption amount of NO is correlated with the concentration of oxygen vacancy formed and the adsorption type and strength of NOare related to the valence of metallic ion.Generally there are three kinds of adsorption species, NO-,NO+ and NO on the mixed oxides, among them the negative adsorpion species(NO-)are active for NOdecomposition.The weaker the adsorption of oxygen on the catalyst is, the faster the mobility of oxygen is and the easier the redox process takes place in reproducing the active sites in which the oxygen species(O-,O2-)would participate.

Key words: Perovskite and related structure mixed oxides, Adsorption of NO, Oxygen vacancy, Valence of metal ion

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