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

Yinying Wei; Umberto Martinez; Lutz Lammich; Flemming Besenbacher; Stefan Wendt

doi:10.1016/j.susc.2013.09.020

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

Yinying Wei, Umberto Martinez, Lutz Lammich, Flemming Besenbacher, Stefan Wendt

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

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.

Original language	English
Journal	Surface Science
Volume	619
Pages (from-to)	L1-L5
Number of pages	5
ISSN	0039-6028
DOIs	https://doi.org/10.1016/j.susc.2013.09.020
Publication status	Published - 2014

Keywords

RuO2; Hydrogen; Dissociation; STM; TPR; DFT

Access to Document

10.1016/j.susc.2013.09.020

Cite this

@article{20974e469e4b40b58f841db1ec72493e,

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

abstract = "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.",

keywords = "RuO2; Hydrogen; Dissociation; STM; TPR; DFT",

author = "Yinying Wei and Umberto Martinez and Lutz Lammich and Flemming Besenbacher and Stefan Wendt",

year = "2014",

doi = "10.1016/j.susc.2013.09.020",

language = "English",

volume = "619",

pages = "L1--L5",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier BV * North-Holland",

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TY - JOUR

T1 - Formation of metastable, heterolytic H-pairs on the RuO2(110) surface

AU - Wei, Yinying

AU - Martinez, Umberto

AU - Lammich, Lutz

AU - Besenbacher, Flemming

AU - Wendt, Stefan

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - RuO2; Hydrogen; Dissociation; STM; TPR; DFT

U2 - 10.1016/j.susc.2013.09.020

DO - 10.1016/j.susc.2013.09.020

M3 - Journal article

SN - 0039-6028

VL - 619

SP - L1-L5

JO - Surface Science

JF - Surface Science

ER -