Electrocatalytic Behavior of Ion‐Beam Mixed Ni‐Pd Surface Alloys for the Hydrogen Evolution Reaction in KOH

The hydrogen evolution reaction in aqueous 30 weight percent KOH electrolyte at 80°C was investigated for Ni‐Pd surface alloys, produced by the ion beam mixing technique. Surface alloys, containing 55–90 atom percent (a/o) Pd, were produced by subjecting evaporated layers of Ni and Pd on Ni substrates to 120 keV Ar+ ion bombardment; the alloy composition vs. depth was monitored by Rutherford backscattering using 2 MeV 4He+ ions. Polarization of …