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The electroxidation of As ad-atoms on Pt and Au electrodes was investigated using cyclic voltammetry and the EQCM technique. Arsenic ad-atoms are oxidized to an arsenic compound with +3 oxidation state at 0.8 V, where the mass change corresponds to 1.5 oxygen atoms per arsenic atom, e.g. As 2n O 3n (n ≥ 1) is regarded as the oxygen-containing compound. From the results...
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