Hybrid Water Electrolysis: Non-Oxide Electrocatalysts in Small Molecule Oxidation

초록

There is a growing necessity for green and sustainable energy sources, which has led to more research into hydrogen (H2) as a next-generation energy carrier. This is because hydrogen has a high gravimetric energy density and can be used without releasing carbon. Conventional H2 production through steam reforming is expensive and limited by purity. Water electrolysis, on the other hand, is a cleaner way to do it, but the oxygen evolution reaction (OER) is slow. To sort out this issue, the hydrazine oxidation reaction (HzOR) has surfaced as a viable alternative anodic process, characterized by its low thermodynamic potential, swift electrooxidation kinetics, and capacity to convert hydrazine pollutants into environmentally benign by-products. Transition-metal sulfides (TMSs), especially two-dimensional transition-metal dichalcogenides (2D-TMDs), have recently become popular as cheap and effective electrocatalysts for HER (hydrogen evolution reaction), OER, and HzOR. They have adjustable structures, high conductivity, and a lot of active sites. This chapter summarizes the latest developments in metal sulfide-constructed electrocatalysts for Hz-assisted water electrolysis, focusing on the structural benefits, mechanistic insights, and prospects. © 2026 Wiley-VCH GmbH. All rights reserved, including rights for text and data mining and training of artificial intelligence technologies or similar technologies. Published 2026 by Wiley-VCH GmbH.