Abstract
AbstractWater electrolysis has been considered a promising avenue for ultrapure hydrogen production. However, the energy efficiency of conventional water electrolysis technologies is severely hampered by the kinetic limitations of the anodic oxygen evolution reaction (OER). Over the past decade, an innovative hybrid water electrolysis strategy of replacing the OER with more facile oxidation reactions and coupling with the cathodic hydrogen evolution reaction (HER) has been developed and demonstrated its utility of addressing the critical challenges in conventional water electrolysis. In this Review, we summarize the recent progress concerning electrochemical hydrogen production from water through hybrid water electrolysis technology, with special emphasis on the selection of electrocatalysts and alternative anodic oxidation reactions as well as the related mechanisms involving in electrochemical reactions. Finally, the current challenges and some perspectives are also discussed for the future development of hybrid water electrolysis technology.
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