Unusual Stability of Carbon Monoxide Adsorbed on the Ru(0001) Electrode Surface
Open Access
- 1 January 1999
- journal article
- Published by The Electrochemical Society in Electrochemical and Solid-State Letters
- Vol. 3 (11) , 508-510
- https://doi.org/10.1149/1.1391193
Abstract
Adsorption and oxidation of carbon monoxide have been studied on single crystal and polycrystalline surfaces in sulfuric acid solutions by in situ Fourier transform infrared spectroscopy and electrochemical techniques. Carbon monoxide adsorbs on in linear and threefold bonding configurations, while only a linear configuration has been observed on polycrystalline surfaces. No oxidation can be discerned from the infrared spectra, because no band is observed up to , in sharp contrast with the facile reaction on polycrystalline surfaces. Voltammetry shows a negligible oxidation at very positive potentials. Oxidation of surface is limited to a one electron per atom process, distinctly different from a high degree of oxidation of polycrystalline . A limited oxidation of is likely the cause of the inactivity of for oxidation, which suggests an important role of the surface structure and the form of ruthenium oxide in catalyzing oxidation. ©2000 The Electrochemical SocietyKeywords
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