2026-05-28T20:34:18Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/403442026-02-03T11:20:19Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Reyna-Peña, Fátima
author
Atienza-Márquez, Antonio
author
Sunpil, Jang
author
Shiono, Ryuhei
author
Shigemasa, Kaito
author
Araki, Takuto
author
Nagasawa, Kensaku
author
Mitsushima, Shigenori
2025-10-21T06:50:04Z
2025-10-21T06:50:04Z
2023-08-24
Reyna-Peña, F.I. , Atienza-Márquez, A. , et al. In situ X-ray CT visualization of hydrogen bubbles inside the porous transport layer of a direct toluene electro-hydrogenation electrolyzer. International Journal of Hydrogen EnergyOpen source preview, 2024, 50, pp. 787–798
https://hdl.handle.net/10630/40344
10.1016/j.ijhydene.2023.08.132
The organic hydride toluene/methylcyclohexane is an attractive hydrogen carrier. The direct electro-hydrogenation of toluene to methylcyclohexane has a higher energy efficiency compared to the conventional two-step method. Yet, there are factors inhibiting the toluene supply to the cathode reaction site and reducing the conversion rate to methylcyclohexane. Thus, hydrogen may be generated as a side reaction. Understanding how hydrogen bubbles are distributed is crucial regarding the design optimization of these electrochemical devices. This work presents, for the first time in a direct toluene electro-hydrogenation electrolyzer, the X-ray visualization of hydrogen bubbles inside the porous electrode. The concentration of bubbles was higher near the cathode catalyst and tended to increase with the electric current and operating time. Bubble distribution spreads across the active area when using flat field plates. As for rib-and-channel field plates, despite bubbles mostly concentrated beneath ribs, the total hydrogen accumulated inside the porous electrode could be reduced.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Electroquímica
Electrólisis
In situ X-ray CT visualization of hydrogen bubbles inside the porous transport layer of a direct toluene electro-hydrogenation electrolyzer.
journal article
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URL
https://riuma.uma.es/bitstreams/1942c067-d6b8-4d0e-933a-753e2a95ee51/download
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cf3407280e9f2491bd0ad97ee7260409
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Corrected_proof_1-s2.0-S0360319923041344-main.pdf