Hierarchical WC/NiCoW hollow nanotube array as highly efficient electrocatalyst for hydrogen evolution

Abstract

Hydrogen evolution reaction (HER) holds great potential for sustainable hydrogen production but developing efficient and cost-effective electrocatalysts remains challenge. Here, we report the synthesis of a hierarchical WC/NiCoW hollow nanotube array electrocatalyst, featuring rapid gas release to minimize bubble aggregation and reaction retardant. Mechanistic insights into HER kinetics reveal enhanced electron transfer at WC-NiCoW interface and accelerated Volmer step. The optimized WC/NCW-600 exhibits superior HER activity and remarkable long-term stability for over 72 h in alternated acidic, neutral, and alkaline electrolytes. This work highlights new insights into rational structural design of durable electrocatalysts for hydrogen production.