化学学报 ›› 2004, Vol. 62 ›› Issue (15): 1397-1404. 上一篇    下一篇

研究论文

氧原子在Mo低指数表面及(211)高指数面上的吸附和振动

刁兆玉, 韩玲利, 王泽新   

  1. 山东师范大学化学系, 济南, 250014
  • 投稿日期:2003-12-29 修回日期:2004-03-12 发布日期:2014-02-17
  • 通讯作者: 王泽新,E-mail:wangzexin@sdnu.edu.cn E-mail:wangzexin@sdnu.edu.cn
  • 基金资助:
    山东省自然科学基金(No.Y2002B09)资助项目.

Adsorption and Vibration for O Atom on Mo Low-Index and (211) High-Index Surfaces

DIAO Zhao-Yu, HAN Ling-Li, WANG Ze-Xin   

  1. Department of Chemistry, Shandong Normal University, Jinan 250014
  • Received:2003-12-29 Revised:2004-03-12 Published:2014-02-17

应用原子和表面簇合物相互作用的5参数Morse势方法(5-MP)对O-Mo低指数表面体系及(211)高指数面体系进行了系统的研究,并获得了全部临界点特性,如吸附位、吸附几何、结合能、正则振动频率等.计算结果表明:在Mo(100)面,O原子吸附在四重洞位,随着覆盖度增加,(100)面发生缺行重构,膺式三重位为稳定吸附位;在Mo(110),(111)及(211)面,O原子均趋向于吸附在膺式三重位.

关键词: O-Mo表面体系, 5-MP势, 表面吸附, 表面振动, O-Mo(211)体系

The 5-parameter Morse potential (5-MP) of the interaction between O atom and Mo surface has been constructed.The adsorption and diffusion of O on Mo low index surface and Mo(211) high index surface were investigated with 5-MP in detail.All critical characteristics of the system were obtained, such as adsorption site, adsorption geometry, binding energy, eigenvalues for vibration, etc.The calculated results show that O atom is located at the fourfold hollow site of the intact Mo(100) surface; increasing O coverage, the missing-row reconstruction happens on Mo(100), and quasi-3-fold site becomes stable adsorption site, and on Mo(110), (111) and (211) surfaces, O atom tends to occupy quasi-3-fold site without exception.

Key words: O2Mo system, 5-MP, surface adsorption, surface vibration, O-Mo(211)system