Modulating Pt‐N/O Bonds on Co‐doped WO3 for Acid Electrocatalytic Hydrogen Evolution with Over 2000 h Operation

Abstract Developing durable electrocatalysts with high performance for hydrogen evolution reaction (HER) in acid conditions is of prime challenge for hydrogen production. Durability is of important prerequisite for catalyst application. Herein, this work constructs the Co‐doped WO 3 loaded with Pt nanoparticles under ammonia treatment (Pt/N‐CoWO 3 ) with the Pt‐N/O‐W interaction, which shows excellent activity and stability for acidic hydrogen production at industrial current density. The electronic structure of Pt species is modulated with enhanced Pt‐N/O bonding by Co doping, hence reinforcing the metal‐support interaction, and greatly enhancing the stability of the catalyst under high current density in acidic media. The resultant Pt/N‐CoWO 3 catalyst exhibits the overpotentials of only 94 and 108 mV at high current densities of 1 and 2 A cm −2 , respectively. More impressively, Pt/N‐CoWO 3 delivers a record operation for acid electrocatalytic hydrogen evolution over 2000 h at 1 A cm −2 , denoting its potential for catalyst applications at the industrial current density. This work opens a new avenue for developing Pt‐loading acidic HER catalysts for long‐term operation at ampere‐level current densities in acid conditions.