Alkaline hydrogen electrode and oxygen reduction reaction on PtxNi nanoalloys

The electrochemical characterization of chemical carbonyl route generated Pt:Ni nano-alloys, in acid and alkaline media, is reported. Earlier XRD and Debye Function Analysis (DFA) studies (Yang et al., 2004[1]) provided the structure of these nanoalloys. Herein, the HER/HOR electrocatalytic activity as well as ORR kinetics, in alkaline medium, was determined and correlated with the interatomic Pt-Pt distance. The HER/HOR and ORR exchange current densities describes a Volcano-like plot. For both systems, the maximum activity for both processes peaked with Pt3Ni. (C) 2019 Elsevier B.V. All rights reserved.