Surface sulfidation toward highly active S/NiMoSe for superior alkaline hydrogen evolution

Abstract

A S/NiMoSe hierarchical microsphere-supported nanofiber electrocatalyst was synthesized via a surface sulfidation strategy. It exhibits excellent alkaline HER performance. Surface sulfidation weakens interfacial water hydrogen-bonding and generates SO₄²⁻ via reconstruction, thus sustaining high electrocatalyst activity and stability.