Decoupling Electrolytic Water Splitting by an Oxygen-Mediating Process.

ABSTRACT: Decoupled water electrolysis systems, incorporating a reversible redox mediator that allows for the construction of membrane-free electrolyzers, have emerged as a promising approach to produce high-purity hydrogen with remarkable flexibility. The key factor crucial for practical applications lies in the development of mediator electrodes that possess suitable redox potential, high redox capacity, excellent cycling reversibility and stability. Herein, we introduce a novel concept of oxygen-mediating redox mediators (ORMs) employing Bi₂O₃ as an example material, which are capable of sequestering oxygen during the hydrogen evolution reaction and subsequently releasing it to generate oxygen gas under alkaline conditions. Thanks to its remarkable reversible redox activity

SUBMITTER: Xu M 

PROVIDER: S-EPMC11522909 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature