It is noteworthy that at HER currents close to and beyond the diffusion limit of ≈3 mA/cm 2 (although determined for the HOR, this transport-related limit should be somewhat significant for HER as well [ 1 ]) evolved gaseous H 2 would shield parts of the electrode.
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Probing Transition-Metal Silicides as PGM-Free Catalysts for Hydrogen Oxidation and Evolution in Acidic Medium.
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