Interaction of hydrogen with (210)-oriented metal surfaces: Molecular precursors, chemisorbed atoms and subsurface states
Interaction of hydrogen with (210)-oriented metal surfaces: Molecular precursors, chemisorbed atoms and subsurface states
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DOI：
10.1016/j.susc.2008.09.066
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发表时间：
2009-06-01
期刊：
影响因子：
1.9
通讯作者：
Christmann, Klaus
中科院分区：
文献类型：
--
作者：
Christmann, Klaus
研究了氢与金属表面相互作用的一些选定方面，重点是在通常已知容易自发解离氢分子（Ni、Pd、Rh）的表面上分子前体态的形成。我们将证明面心立方（“f.c.c”）晶格的晶体学（2 1 0）取向似乎提供了稳定（弱）化学吸附的 H-2 物质的特定途径，尽管存在普通的 H-2 解离化学吸附，并且在 Pd 情况下 - 地下 H 态形成。这种分子氢物质——尽管或仅仅因为它与仅类似于20-25 kJ/摩尔的吸附能结合，可能在非均相催化表面和先于固体材料中的氢储存的氢吸收反应中发挥重要作用。 (C) 2009 Elsevier B.V. 保留所有权利
Some selected aspects of hydrogen interaction with metal surfaces are surveyed with emphasis on the formation of molecular precursor states on surfaces that are normally known to readily and spontaneously dissociate hydrogen molecules (Ni, Pd, Rh). We will demonstrate that the crystallographic (2 1 0) orientation of the face-centered cubic ("f.c.c") lattice seems to provide a particular route for stabilizing a (weakly) chemisorbed H-2 species notwithstanding the ordinary H-2 dissociative chemisorption and in the Pd case - subsurface H state formation. This molecular hydrogen species - although or just because it is bound with an adsorption energy of merely similar to 20-25 kJ/mole may play an essential role both in heterogeneously catalysed surface and hydrogen uptake reactions that precede, e.g., H storage in solid materials. (C) 2009 Elsevier B.V. All rights reserved