Open AccessSTUDY ON THE ADSORPTION OF HYDROGEN ON SUPPORTED-METAL SURFACES
Author(s) -
Ju Xie,
Tao Zhang,
Wenchang Lu
Publication year - 1993
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.42.1815
Subject(s) - adsorption , materials science , metal , hydrogen , binding energy , composite number , interaction energy , chemical engineering , chemistry , atomic physics , composite material , molecule , metallurgy , physics , organic chemistry , engineering
The adsorption properties of hydrogen on the supported-metal surfaces are investigated using the Green function method within the framework of tight-binding approximation. The adsorption energy ΔE and the adatom state energy Ead, for hydrogen adsorption on Pt/ZnO, Cu/ZnO and Ni/ZnO composite systems are calculated by employing the self-consistent An-derson-Newns adsorption theory. The effects of the metal-support interaction on the adsorption properties of hydrogen on supported-metal surfaces are discussed. It is found that the stronger the metal-support interaction is, the less the adsorption energy and charge transfer for H on Pt(Cu,Ni)/ZnO become. The metal-support interaction impedes hydrogen adsorption on the metal surfaces. This effect becomes weak as the metal film grows thick.