物理化学学报 >> 1995, Vol. 11 >> Issue (08): 678-680.doi: 10.3866/PKU.WHXB19950802

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用XPS和H2化学吸附研究钝化Mo2N的还原作用

李新生,盛世善,陈恒荣,纪纯新,张耀军,辛勤   

  1. 中国科学院大连化学物理研究所|催化基础国家重点实验室|大连 116023
  • 收稿日期:1995-05-02 修回日期:1995-06-12 发布日期:1995-08-15
  • 通讯作者: 李新生

Reduction Effects of the Passivated Mo2N Studied by XPS and H2 Chemisorption

Li Xin-Sheng,Sheng Shi-Shan,Chen Heng-Rong,Ji Chun-Xin,Zhang Yao-Jun,Xin Qin   

  1. State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023
  • Received:1995-05-02 Revised:1995-06-12 Published:1995-08-15
  • Contact: Li Xin-Sheng

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关键词: Mo2N, 电子能谱, 化学吸附

Abstract:

XPS has been applied to study the reduction influence of the passivated Mo2N sample on H2 chemisorption at room temperature. It is found that most of the Mo6+ species was reduced to low valence molybdenum species (Moδ+:δ≦4) when reduction temperature was raised up to 673K, meanwhile sharp increases of both the irreversible and reversible hydrogen uptakes were measured. The irreversible amount increased to a larger extent. Accordingly, the active sites towards hydrogen adsorption are tentatively proposed to the low valence molybdenum species with nitrogen deficient.

Key words: Mo2N, X-ray photoelectron spectroscopy, Hydrogen chemisorption