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

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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 languageEnglish
JournalSurface Science
Pages (from-to)L1-L5
Number of pages5
Publication statusPublished - 2014

    Research areas

  • RuO2; Hydrogen; Dissociation; STM; TPR; DFT

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