Abstract
A solid oxide electrolysis cell for reducing CO2 to CO was studied using a LaGaO3-based electrolyte at intermediate temperatures (973-1173 K). Various metals were examined as cathodes for CO2 reduction, and it was found that Ni shows high activity. However, coke formation was observed during the initial period. Furthermore, we found that the electrolysis current could be greatly improved by adding Fe to Ni, resulting in a current density of 1.84 A cm-2 at 1.6 V and 1073 K on a Ni-Fe (9:1) cathode. SEM observation suggests that improved cathodic activity can be explained by stabilizing Ni fine particles with the addition of Fe. Therefore, diffusion resistance can be decreased by adding Fe to Ni. The formation rate of CO is slightly lower than the consumption rate of CO2, suggesting coke formation during the initial period. However, stable CO2 electrolysis can be performed for at least 12 h, and Fe addition is effective for increasing long-term stability of electrolysis.
| Original language | English |
|---|---|
| Pages (from-to) | 12455-12461 |
| Number of pages | 7 |
| Journal | Journal of Materials Chemistry A |
| Volume | 1 |
| Issue number | 40 |
| DOIs | |
| Publication status | Published - Oct 28 2013 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
Ni-Fe bimetallic cathodes for intermediate temperature CO2 electrolyzers using a La0.9Sr0.1Ga0.8Mg 0.2O3 electrolyte. / Wang, Shijing; Inoishi, Atsushi; Hong, Jong Eun; Ju, Young Wan; Hagiwara, Hidehisa; Ida, Shintaro; Ishihara, Tatsumi.
In: Journal of Materials Chemistry A, Vol. 1, No. 40, 28.10.2013, p. 12455-12461.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ni-Fe bimetallic cathodes for intermediate temperature CO2 electrolyzers using a La0.9Sr0.1Ga0.8Mg 0.2O3 electrolyte
AU - Wang, Shijing
AU - Inoishi, Atsushi
AU - Hong, Jong Eun
AU - Ju, Young Wan
AU - Hagiwara, Hidehisa
AU - Ida, Shintaro
AU - Ishihara, Tatsumi
PY - 2013/10/28
Y1 - 2013/10/28
N2 - A solid oxide electrolysis cell for reducing CO2 to CO was studied using a LaGaO3-based electrolyte at intermediate temperatures (973-1173 K). Various metals were examined as cathodes for CO2 reduction, and it was found that Ni shows high activity. However, coke formation was observed during the initial period. Furthermore, we found that the electrolysis current could be greatly improved by adding Fe to Ni, resulting in a current density of 1.84 A cm-2 at 1.6 V and 1073 K on a Ni-Fe (9:1) cathode. SEM observation suggests that improved cathodic activity can be explained by stabilizing Ni fine particles with the addition of Fe. Therefore, diffusion resistance can be decreased by adding Fe to Ni. The formation rate of CO is slightly lower than the consumption rate of CO2, suggesting coke formation during the initial period. However, stable CO2 electrolysis can be performed for at least 12 h, and Fe addition is effective for increasing long-term stability of electrolysis.
AB - A solid oxide electrolysis cell for reducing CO2 to CO was studied using a LaGaO3-based electrolyte at intermediate temperatures (973-1173 K). Various metals were examined as cathodes for CO2 reduction, and it was found that Ni shows high activity. However, coke formation was observed during the initial period. Furthermore, we found that the electrolysis current could be greatly improved by adding Fe to Ni, resulting in a current density of 1.84 A cm-2 at 1.6 V and 1073 K on a Ni-Fe (9:1) cathode. SEM observation suggests that improved cathodic activity can be explained by stabilizing Ni fine particles with the addition of Fe. Therefore, diffusion resistance can be decreased by adding Fe to Ni. The formation rate of CO is slightly lower than the consumption rate of CO2, suggesting coke formation during the initial period. However, stable CO2 electrolysis can be performed for at least 12 h, and Fe addition is effective for increasing long-term stability of electrolysis.
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U2 - 10.1039/c3ta11863k
DO - 10.1039/c3ta11863k
M3 - Article
VL - 1
SP - 12455
EP - 12461
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 40
ER -