期刊
SURFACE SCIENCE
卷 588, 期 1-3, 页码 L209-L219出版社
ELSEVIER
DOI: 10.1016/j.susc.2005.05.037
关键词
sum frequency generations; palladium; clusters; carbon monoxide; hydrogen molecules; alkenes; low-index single crystal surfaces; catalysis; vibrations of adsorbed molecules
Pd-hydride formation proceeds predominantly via minority sites on Pd nanoparticles (defects and (10 0) facets). Finite size effects govern the surface chemistry, e.g. explosive hydrogen desorption in the presence of a CO overlayer originates from the confinement of dissolved hydrogen within the limited nanoparticle volume. In situ surface vibrational spectra, acquired during CO hydrogenation under technical conditions, suggest surface roughening or a partly disordered CO adsorbate phase that only occur at elevated pressure. The presence of Pd-hydride phases yielded a very high activity for C2H4 hydrogenation on the Pd nanoparticles which may again be related to the hydrogen confinement effect. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据