High-performance, acid-durable nonprecious ternary alloy cathode via Zn dealloying for proton exchange membrane water electrolysis

Abstract

We present a nonprecious NiMo-based cathode with high activity and durability for proton exchange membrane water electrolysis, achieved via selective Zn dealloying and subsequent thermal annealing. This synergistic strategy simultaneously increases the electrochemically active surface area, achieving 1.897 A cm⁻² at 2.0 V_cell, and ensures structural stability in acidic media.