We have investigated the potential dependent surface phase behaviour of a Cu(111) electrode in a neutral sulfate containing electrolyte by cyclic voltammetry (CV) and electrochemical in situ scanning tunneling microscopy (ECSTM). The cyclic voltammograms show characteristic peaks for the formation/reduction of an oxide film. Based on our ECSTM measurements obtained over the entire potential range between hydrogen evolution at –900 mV vs. RHE and passivation up to +175 mV, the potential window can be divided into four regions with characteristic surface structures. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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Friebel et al. (2004) studied this question.
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