Observation of Three-Phase Interface during Hydrogen Electrode Reactions in Unitized Regenerative Fuel Cell

Majima, Wataru; Matsushima, Hisayoshi; Fukunaka, Yasuhiro et al.

Journal of The Electrochemical Society, 2014, 161(10), F1002-F1005

Permalink : https://hdl.handle.net/2115/57426

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アクセス権
open access
URI
https://hdl.handle.net/2115/57426
タイトル
Observation of Three-Phase Interface during Hydrogen Electrode Reactions in Unitized Regenerative Fuel Cell
著者
Majima, Wataru ; Matsushima, Hisayoshi ; Fukunaka, Yasuhiro ; Ueda, Mikito
著者名
Majima, Wataru
e-Rad_Researcher
30578026
著者名
Matsushima, Hisayoshi
著者名
Fukunaka, Yasuhiro
著者名
Ueda, Mikito
言語
英語
発行日
2014-07-09
出版者
The Electrochemical Society
収録物名
Journal of The Electrochemical Society
巻(号)
161(10)
ページ
F1002-F1005
抄録
The dynamic behavior of the meniscus of a potassium hydroxide and sulfuric acid droplet on a platinum electrode was studied using a charge-coupled device (CCD) camera and confocal laser microscopy. The three-phase interface was investigated during the hydrogen oxidation reaction (HOR) and the hydrogen evolution reaction (HER). Contact angle measurements revealed a spreading interface during the HER whereas the droplet shape remained unchanged during the HOR for both droplets. The overhead view revealed the formation of many fine droplets near the meniscus boundary during the HOR in the alkaline electrolyte, which agrees with previous results for the oxygen reduction reaction (ORR). The correlation of these observations with electrochemical data and differences in the results between the HOR and the HER suggest that the motion of the meniscus was induced by local pH and temperature gradients, presumably caused by a non-uniform reaction because of the limitations of the dissolved gas.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
PISSN
0013-4651
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.1149/2.0391410jes