A Strongly Coupled Cluster Heterostructure with Pt–N-Mo Bonding for Durable and Efficient H2 Evolution in Anion-Exchange Membrane Water Electrolyzers

A strongly coupled platinum/molybdenum nitrides nanocluster heterostructure has been prepared by using Pt-containing Anderson-type polyoxometalates as precursors. The pronounced electronic coupling at the Pt/Mo 2 N cluster interface facilitates the catalytic decomposition of H 2 O through synergistic stabilization of Pt-H * and Mo-OH * . The optimized Pt/Mo 2 N-NrGO exhibits a remarkably low overpotential, high mass activity, and exceptional long-term durability (>500 h at 1500 mA cm -2 ) in a practical anion-exchange membrane water electrolyzer.