物理化学学报 >> 2000, Vol. 16 >> Issue (05): 464-467.doi: 10.3866/PKU.WHXB20000518

研究简报 上一篇    下一篇

微量热法研究γ-Mo2N催化剂表面氢的微分吸附热

张耀君, 辛勤   

  1. 西安石油学院石油化工系,西安 710065|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:1999-07-27 修回日期:1999-11-05 发布日期:2000-05-15
  • 通讯作者: 张耀君

Studies on Differential Heats H2 Adsorption over γ-Mo2N Catalysts by Microcalorimetry

Zhang Yao-Jun, Xin Qin   

  1. Petroleum Engineering Department,Xi'an Petroleum Institute,Xi'an 710065|State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023
  • Received:1999-07-27 Revised:1999-11-05 Published:2000-05-15
  • Contact: Zhang Yao-Jun

关键词: γ-Mo2N, 微量热法, 氢的微分吸附热

Abstract:

Differential heats of H 2 adsorption on γ-Mo2N catalysts were studied by using microcalorimetry. Samples with high and medium surface areas (90 and 17 m2•g -1 ) present a homogeneous energetic distribution of surface sites, which corresponds with the preferential orientation of their (200) planes. Molybdenum nitride with low surface area (8 m2•g -1 ) displays a heterogeneous energetic distribution of H 2 adsorption sites. The higher initial differential heat of hydrogen adsorption observed for the low surface Mo nitride was attributed to species adsorbed on surface sites associated with the (111) plane.

Key words: γ-Mo2N, Microcalorimetry, Differential heat of H2 adsorption