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- W2045302562 abstract "The adsorption of water and coadsorption with oxygen on Rh{111} under ultrahigh vacuum conditions was studied using synchrotron-based photoemission and photoabsorption spectroscopy. Water adsorbs intact on the clean surface at temperatures below 154 K. Irradiation with x-rays, however, induces fast dissociation and the formation of a mixed OH+H(2)O layer indicating that the partially dissociated layer is thermodynamically more stable. Coadsorption of water and oxygen at a coverage below 0.3 monolayers has a similar effect, leading to the formation of a hydrogen-bonded network of water and hydroxyl molecules at a ratio of 3:2. The partially dissociated layers are more stable than chemisorbed intact water with the maximum desorption temperatures up to 30 K higher. For higher oxygen coverage, up to 0.5 monolayers, water does not dissociate and an intact water species is observed above 160 K, which is characterized by an O 1s binding energy 0.6 eV higher than that of chemisorbed water and a high desorption temperature similar to the partially dissociated layer. The extra stabilization is most likely due to hydrogen bonds with atomic oxygen." @default.
- W2045302562 created "2016-06-24" @default.
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- W2045302562 date "2009-12-07" @default.
- W2045302562 modified "2023-09-27" @default.
- W2045302562 title "Dissociation of water on oxygen-covered Rh{111}" @default.
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- W2045302562 doi "https://doi.org/10.1063/1.3266941" @default.
- W2045302562 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19968360" @default.
- W2045302562 hasPublicationYear "2009" @default.
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