Formation of metastable, heterolytic H-pairs on the RuO2(110) surface

被引：19

作者：

Wei, Yinying ^{[1
]}

Martinez, Umberto ^{[1
]}

Lammich, Lutz ^{[1
]}

Besenbacher, Flemming ^{[1
]}

Wendt, Stefan ^{[1
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus C, Denmark

来源：

SURFACE SCIENCE | 2014年 / 619卷

基金：

欧洲研究理事会;

关键词：

RuO2; Hydrogen; Dissociation; STM; TPR; DFT; HYDROGEN; CHEMISTRY; ADSORPTION; CHEMISORPTION; DISSOCIATION; COORDINATION; TIO2; STM; H-2;

D O I：

10.1016/j.susc.2013.09.020

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：

The interaction of molecular hydrogen (H-2) with the stoichiometric RuO2(110) surface was studied at various temperatures and coverages by high-resolution scanning tunneling microscopy (STM) and temperature-programmed reaction (TPR). Metastable, heterolytic H-pairs of dissociated H-2 consisting of one H adsorbed on a surface Ru atom and the other H at an adjacent bridging O atom are identified. This H-pair configuration is consistent with accompanying density functional theory (DFT) calculations and spectroscopic data. We propose that such metastable, heterolytic H-pairs are a typical feature of late transition metal oxide surfaces. Furthermore, the adsorption temperature was found to be decisive for the configuration of the adsorbed hydrogen species and the sticking of H-2. (C) 2013 Elsevier B.V. All rights reserved.

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页码：L1 / L5

页数：5

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