Abstract
The four primary states of hydrogen adsorption on polycrystalline platinum electrodes are assigned to sites characteristic of (100), (110), and (111) single crystal surfaces. The coupling between hydrogen adsorption and adsorbed sulfuric and hydrochloric acid anions is investigated. Time resolved staircase voltammetry is used to show the absence of a cathodic counterpart to the “third anodic peak”. The results of electrochemical relaxation measurements following small potential step perturbations are given for Pt(110) in sulfuric acid.
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