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Updated: Jun 7, 2025

Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
Decoupled Water Reduction and Hydrazine Oxidation by Fast Proton Transport MoO3 Redox Mediator for Hydrogen
AJing Song1, Yuan Wei1, Xin Jin1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai, 201620, China.
Abstract:
Water electrolysis powered by renewable energy is a green and sustainable method for hydrogen production. Decoupled water electrolysis with the aid of solid-state redox mediator could separate the hydrogen and oxygen production in time and space without the use of the membrane, showing high flexibility. Herein, a MoO3 electrode with fast proton transport property is employed as a solid-state redox mediator to construct a membrane-free decoupled acidic electrolytic system. The MoO3 electrode exhibits high specific capacity (204.3 mAh g-1 at 5 A g-1) and excellent rate performance (92.8 mAh g-1 at 150 A g-1) in the acidic environment. Due to the dense oxide-ion arrays, MoO3 still exhibits excellent performance under high mass-loading. In addition, a hybrid decoupled electrolysis system is also constructed by combining water reduction and hydrazine oxidation, which can not only generate high-purity H2 but also remove hydrazine hazards in acidic wastewater with lower energy consumption.
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