抄録
Current interrupt and galvanostatic EIS techniques were utilized in a complementary fashion to characterize the different sources of overpotential during anodic gas evolution. Room temperature anodic evolution of oxygen at a nickel working electrode in aqueous potassium hydroxide and the high temperature (348°C) anodic evolution of chlorine at a glassy carbon working electrode in molten (LiCl)57.5-(KCl)13.3-(CsCl)29.2 where investigatd. Combining of the two techniques enables to separate the total measured overpotential into its ohmic, charge transfer, and mass transfer components. Potential decay curves indicated that natural convection (due to both bubble evolution and density driven flow) was a major driving force in reestablishing equilibrium conditions at the working electrode surface. During oxygen evolution, charge transfer resistance dominated the total overpotential at low current densities, but as the current density approached ∼100mA/cm2, mass transfer overpotentials and ohmic overpotential became non-negligible. The mass transfer overpotential during chlorine evolution was found to be half that found during oxygen evolution.
| 元の言語 | English |
|---|---|
| ページ（範囲） | E323-E329 |
| ジャーナル | Journal of the Electrochemical Society |
| 巻 | 166 |
| 発行部数 | 10 |
| DOI | |
| 出版物ステータス | Published - 2019 1 1 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry
これを引用
Experimental measurement of overpotential sources during anodic gas evolution in aqueous and molten salt systems. / Chmielowiec, Brian; Fujimura, Tatsuki; Otani, Tomohiro; Aoyama, Kiego; Nohira, Toshiyuki; Homma, Takayuki; Fukunaka, Yasuhiro; Allanore, Antoine.
：: Journal of the Electrochemical Society, 巻 166, 番号 10, 01.01.2019, p. E323-E329.研究成果: Article
}
TY - JOUR
T1 - Experimental measurement of overpotential sources during anodic gas evolution in aqueous and molten salt systems
AU - Chmielowiec, Brian
AU - Fujimura, Tatsuki
AU - Otani, Tomohiro
AU - Aoyama, Kiego
AU - Nohira, Toshiyuki
AU - Homma, Takayuki
AU - Fukunaka, Yasuhiro
AU - Allanore, Antoine
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Current interrupt and galvanostatic EIS techniques were utilized in a complementary fashion to characterize the different sources of overpotential during anodic gas evolution. Room temperature anodic evolution of oxygen at a nickel working electrode in aqueous potassium hydroxide and the high temperature (348°C) anodic evolution of chlorine at a glassy carbon working electrode in molten (LiCl)57.5-(KCl)13.3-(CsCl)29.2 where investigatd. Combining of the two techniques enables to separate the total measured overpotential into its ohmic, charge transfer, and mass transfer components. Potential decay curves indicated that natural convection (due to both bubble evolution and density driven flow) was a major driving force in reestablishing equilibrium conditions at the working electrode surface. During oxygen evolution, charge transfer resistance dominated the total overpotential at low current densities, but as the current density approached ∼100mA/cm2, mass transfer overpotentials and ohmic overpotential became non-negligible. The mass transfer overpotential during chlorine evolution was found to be half that found during oxygen evolution.
AB - Current interrupt and galvanostatic EIS techniques were utilized in a complementary fashion to characterize the different sources of overpotential during anodic gas evolution. Room temperature anodic evolution of oxygen at a nickel working electrode in aqueous potassium hydroxide and the high temperature (348°C) anodic evolution of chlorine at a glassy carbon working electrode in molten (LiCl)57.5-(KCl)13.3-(CsCl)29.2 where investigatd. Combining of the two techniques enables to separate the total measured overpotential into its ohmic, charge transfer, and mass transfer components. Potential decay curves indicated that natural convection (due to both bubble evolution and density driven flow) was a major driving force in reestablishing equilibrium conditions at the working electrode surface. During oxygen evolution, charge transfer resistance dominated the total overpotential at low current densities, but as the current density approached ∼100mA/cm2, mass transfer overpotentials and ohmic overpotential became non-negligible. The mass transfer overpotential during chlorine evolution was found to be half that found during oxygen evolution.
UR - http://www.scopus.com/inward/record.url?scp=85073448315&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85073448315&partnerID=8YFLogxK
U2 - 10.1149/2.1001910jes
DO - 10.1149/2.1001910jes
M3 - Article
AN - SCOPUS:85073448315
VL - 166
SP - E323-E329
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 10
ER -