A high-resolution core-level study of Ni-catalyzed absorption and desorption of hydrogen in Mg-films

被引：9
作者：
Stoltz, S. E.
Popovic, D.
机构：
[1] Lund Univ, MAX Lab, SE-22100 Lund, Sweden
[2] KTH Electrum, Mat & Semicond Phys, SE-16440 Kista, Sweden
来源：
SURFACE SCIENCE | 2007年 / 601卷 / 06期
关键词：
hydrogen storage; magnesium; nickel; hydride; photoelectron spectroscopy;
D O I：
10.1016/j.susc.2007.01.016
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ultra-thin magnesium and magnesium-nickel films grown on Mo(110) under ultra-high vacuum (UHV) conditions are hydrogenated at room temperature with atomic H and studied by high-resolution core-level photoelectron spectroscopy (PES). For the Mg-film a layer of hydride is formed at the Mg/Mo interface and a sub-mono layer of hydride is formed at the surface, while an intermediate region remained non-hydrogenated. For the Mg-Ni-film a thick layer of surface hydride was detected, showing that Ni enhances formation of Mg-hydride at the surface. During the heat-up of the hydrogenated Mg-Ni-film hydrogen desorption started at 400 K. (c) 2007 Elsevier B.V. All rights reserved.
引用
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页码：1507 / 1512
页数：6
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