Hydrogen sorption mechanism of oxidized nickel clusters

被引：27

作者：

Borgschulte, A ^{[1
]}

Westerwaal, RJ ^{[1
]}

Rector, JH ^{[1
]}

Dam, B ^{[1
]}

Griessen, R ^{[1
]}

机构：

[1] Vrije Univ Amsterdam, Dept Phys & Astron, Fac Sci, NL-1081 HV Amsterdam, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 21期

关键词：

D O I：

10.1063/1.1828592

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using an optical technique to measure hydrogen sorption kinetics the catalytic activity of the NiOx clusters is determined. The thus measured temperature dependence reveals an activation energy of 0.58 eV. The catalytic activity of NiOx clusters is studied as a function of the oxygen concentration. The surface properties are analyzed by Auger-electron spectroscopy. It appears that the catalytic hydrogen sorption originates from the dissociative chemisorption of hydrogen on O:Ni, which is strongly suppressed by the presence of oxides. (C) 2004 American Institute of Physics.

引用

页码：4884 / 4886

页数：3

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