Ta2O5-coated Pt electrodes prepared by electrodeposition of Ta and the subsequent calcination were found to possess a remarkably enhanced adsorption/desorption characteristic of hydrogen atoms in sulfuric acid solutions compared with bare Pt electrodes. This enhancement can be explained by a spillover–reverse spillover of hydrogen atoms adsorbed at Pt sites over the Ta2O5 surface.
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Sata et al. (2007) studied this question.
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