期刊
CHEMICAL PHYSICS LETTERS
卷 415, 期 1-3, 页码 165-171出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2005.08.119
关键词
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To clarify conflicting reports on the composition and stability of H2O and D2O adsorbates on Ru(0001), we have conducted correlated experiments in two laboratories using X-ray photoelectron spectroscopy and thermal desorption spectroscopy, without and after controlled electron irradiation. Both species form molecular wetting layers; D2O stays molecular to desorption while H2O undergoes a thermal conversion that has been interpreted as partial dissociation. Electron impact leads to this conversion for both H2O and D2O with very high cross-sections (in the high 10(-16) cm(2) range at 100-200 eV) and low threshold energies. These effects may explain discrepancies in recent reports. (c) 2005 Elsevier B.V. All rights reserved.
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