Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Regular Papers
Streaming Potential Boosted Efficient Hydrogen Production by Microfluidic Electrochemical Systems
Shinji NAGAMATSUMasayuki MORIMOTORyosuke IZUMIMasanori HAMANAKAAkio OHTAHitoshi ASAKAWA
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2025 年 93 巻 2 号 p. 027002

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The use of streaming potential in chemical production with microfluidic devices offers a promising approach to reducing energy consumption. This study explored H2 generation through the combined use of applied voltage and streaming potential in a microfluidic system. The microfluidic system with two platinum electrodes embedded in a microchannel was designed to explore the hydrogen evolution reaction (HER) and quantitative analysis was performed using the device with a liquid/gas loop system. The prepared microfluidic device demonstrated that the reduction current increased with flow rate when using an HCl aqueous solution. The results showed an increase in H2 production efficiency by up to 23 % compared to a static state, which can be attributed to the streaming potential. Enhancing chemical production efficiency through streaming potentials could contribute to establishing an innovative chemical production process using microfluidic devices.

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© The Author(s) 2024. Published by ECSJ.

This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium provided the original work is properly cited. [DOI: 10.5796/electrochemistry.24-00113].
https://creativecommons.org/licenses/by/4.0/
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