One‐Step Laser Synthesis of Dual‐Atom Alloy Catalysts for Hydrogen Evolution Reaction

Abstract Recently, dual‐atom alloy (DAA, also named diatomic alloy) catalysts with active metal dimers supported by a less active host metal have attracted considerable interest owing to their distinctive geometric and electrical configurations. Despite developing many ways for synthesizing DAA catalysts, most contemporary methods depend on high‐temperature pyrolysis, costly apparatus, and intricate procedures. This study presents, for the first time, a one‐step laser solid‐phase synthesis of (PtRu) 1 Co DAAs on low‐defect graphene support via ultraviolet (UV) laser irradiation of mixed metal precursors on a ZIF‐67@PBI composite support. The special structure enhances the catalytic performance for hydrogen evolution reaction (HER) in an alkaline solution. An overpotential of 27 mV is reached at a current density of ‐10 mA cm⁻ 2 . The mass activity at 200 mV is 19.6 times more than that of the commercial Pt/C catalyst. Moreover, the catalytic activity sustained stability over 100 h at ‐200 mA cm −2 . The results demonstrated the potential of laser solid‐phase synthesis as a viable method for synthesizing DAA catalysts via precise controlling defect formations on metal nanoparticles and carbon support. This one‐step laser technique is rapid and cost‐effective and opens up a new avenue toward large‐scale synthesis of DAA catalysts.