Disordered structures of adsorbed hydrogens on Ni(111) surface studied by slow positron beam and LEED

摘要：

Hydrogen chemisorption is of considerable importance in connection with heterogeneous catalysis and hydrogen solubility in metals. The chemisorption of hydrogens on nickel surfaces has been the subject of a large number of investigation. Hydrogen chemisorption on Ni(111)surface generates a temperature-programmed-desorption (TPD) peak that saturates at half monolayer (β2) and a second peak (β1) that saturates at full monolayer coverage. A positron is sensitive probe to detect defects near surfaces. We have analyzed the positron annihilation spectra emitted from hydrogen-lightly adsorbed Ni(111) surface and hydrogen-saturatedly adsorbed one. Then we have compared LEED patterns of hydrogen adsorbed on Ni(111) surface with positron annihilation spectra from hydrogen adsorbed Ni(111) surface.

作者: S.Komagata K.Hirota S.Arii S.Honda H.Takaishi I.Kanazawa K.Fukutani K.Nozawa F.Komori

作者单位: Department of Physics,Tokyo Gakugei University,Koganei,Tokyo 184-8501,Japan Institute of Industrial Science,University of Tokyo,4-6-1,Meguro-ku,Tokyo 153-8505,Japan Institute of solid state Physics,University of Tokyo,5-1-5,Kashiwa-shi,Chiba 277-8581,Japan

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 108

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）