Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 582, Issue 1-2, Pages 69-75Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2005.03.019
Keywords
iridium; adsorption; double-layer; capacitance; potential of zero charge; carbon monoxide
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The electrochemical behaviour of Ir(1 1 1) electrodes has been studied in simple aqueous solutions, in the presence and absence of various adsorbates: sulphate, phosphate and halide anions. In general, this electrode is very similar to Pt(1 1 1); however, the rates and relative strengths of adsorption are different. In the accessible potential range no capacitance peak similar to that of Pt(1 1 1) was found, and no Gouy-Chapman minimum could be identified. CO adlayer stripping from Ir(1 1 1) in sulphuric acid occurs in the same potential region as for Pt(1 1 1). (C) 2005 Published by Elsevier B.V.
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