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Review Article

Effect of heat and bubble mass transfer on the efficiency of alkaline electrolysis hydrogen production

Nian Xu1Bingbing Qiu1Zucun Rui1,2Tianxiang Ji1Zilong Liu1Huaqiang Chu1( )
School of Energy and Environment, Anhui University of Technology, Ma’anshan 243002, China
SOJO Electric Hefei Co., Ltd., Hefei 231121, China
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Graphical Abstract

This study explores key strategies for enhancing hydrogen production efficiency in alkaline water electrolysis, focusing on optimizing heat and bubble mass transfer. Measures to enhance heat transfer include the use of metal composites, catalysts to optimize electrodes, precise temperature and pressure control, and increased electrolyte concentration. In addition, techniques to reduce bubble coverage, such as hydrophilic electrodes and voltage smoothing, have been summarized, thereby promoting hydrogen energy technology toward greater efficiency, economy, and environmental friendliness.

Abstract

This review highlights the critical effects of heat transfer and bubble mass transfer in alkaline water electrolysis on hydrogen generation efficiency. To improve heat transfer performance, the study focuses on reducing electrical resistance and controlling the electrolysis system’s temperature. It proposes innovative strategies such as using metal matrix composites and catalysts to optimize electrode structure, precise temperature and pressure regulation and enhanced electrolyte concentration. Additionally, the study examines the dynamics of bubble mass transfer, proposing effective strategies to reduce bubble coverage, including hydrophilic electrodes, mechanically circulating the electrolyte and voltage smoothing with pressure swinging. This study contributes to the advancement of hydrogen energy technology with practical strategies. By adjusting the electrolysis system to optimize the combined effect of these factors, we can improve the efficiency, economy and environmental friendliness of hydrogen production. This will contribute to the transformation of the global energy mix and the implementation of sustainable development strategies.

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Nano Research
Pages 9345-9370
Cite this article:
Xu N, Qiu B, Rui Z, et al. Effect of heat and bubble mass transfer on the efficiency of alkaline electrolysis hydrogen production. Nano Research, 2024, 17(11): 9345-9370. https://doi.org/10.1007/s12274-024-6922-9
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Received: 14 June 2024
Revised: 18 July 2024
Accepted: 30 July 2024
Published: 27 August 2024
© Tsinghua University Press 2024
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