Hydrazine-Assisted Water Electrolysis System: Performance Enhancement and Application Expansion

Abstract

Powered by renewable energy sources, water electrolysis has emerged as a highly promising technology for energy conversion, attracting significant attention in recent years but facing severe challenges especially on the anode. Hydrazine-assisted water electrolysis, incorporating the electro-oxidation of hydrazine on the anode, holds the promise on both greatly reducing input voltage and optimizing system by application expansion. In this review, an overarching overview of hydrazine-assisted water electrolysis, introducing the reaction mechanisms, basic parameters, specific advantages compared with conventional water electrolysis and other hybrid water electrolysis systems, strategies for developing efficient electrocatalysts with enhanced electrocatalytic performance and especially the potential application expansion, is provided. Analysis of the technical and economic aspects, feasibility studies, mechanistic investigations, and relevant comparisons are also involved for providing a deeper insight into hydrazine-assisted water electrolysis. Potential avenues and opportunities for future research in hydrazine-assisted water electrolysis are discussed.