Decoupled Water Reduction and Hydrazine Oxidation by Fast Proton Transport MoO₃ Redox Mediator for Hydrogen Production.

IF 13 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2024-11-18 DOI:10.1002/smll.202407783

AJing Song, Yuan Wei, Xin Jin, Yuanyuan Ma, Yonggang Wang, Jianping Yang

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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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利用快速质子传输 MoO3 氧化还原媒介实现脱钩水还原和肼氧化制氢。

以可再生能源为动力的水电解是一种绿色、可持续的制氢方法。借助固态氧化还原介质的解耦水电解法可以在不使用膜的情况下，在时间和空间上分离氢气和氧气的产生，具有很高的灵活性。本文采用具有快速质子传输特性的 MoO3 电极作为固态氧化还原介质，构建了无膜解耦酸性电解系统。该 MoO3 电极在酸性环境中表现出较高的比容量（5 A g-1 时为 204.3 mAh g-1）和优异的速率性能（150 A g-1 时为 92.8 mAh g-1）。由于氧化物离子阵列致密，MoO3 在高负载质量下仍能表现出卓越的性能。此外，通过将水还原和肼氧化相结合，还构建了一种混合解耦电解系统，不仅能产生高纯度的 H2，还能以较低的能耗去除酸性废水中的肼危害。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Small 工程技术-材料科学：综合

CiteScore

17.70

自引率

3.80%

发文量

1830

审稿时长

2.1 months

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