TY - JOUR
T1 - Spinel-based oxide cathode used for high temperature CO2/H2O co-electrolysis
AU - Wu, Kuan Ting
AU - Ishihara, Tatsumi
N1 - Funding Information:
The authors gratefully acknowledge the financial support of Grant-in-Aid for Specially Promoted Research (No. 16H06293 ) from MEXT through JSPS .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/1
Y1 - 2019/1
N2 - Spinel oxides are applied as cathodes (fuel electrode) for the high temperature co-electrolysis of CO2/H2O mixtures. The spinel oxide is composed of two transition metals, which may improve activity for the reduction of CO2 and H2O. A series of spinel oxides have been synthesized and tested in co-electrolysis mode. A good candidate, CuFe2O4, was found and achieved a current density higher than 1 A/cm2 in CO2/H2O co-electrolysis with a fuel composition of 30%CO2/30%H2O-Ar at 800 °C, although the product was enriched in H2. This material presents superior Coulombic (Faradaic) efficiency for CO + H2 gas products, reaching more than 95%. It shows stable and reversible I-V curves, indicating good electrochemical cell performance in the co-electrolysis operation. In addition, a uniform porous structure with fine particles was observed after co-electrolysis, which may be associated with the stable and reversible electrochemical cell performance observed.
AB - Spinel oxides are applied as cathodes (fuel electrode) for the high temperature co-electrolysis of CO2/H2O mixtures. The spinel oxide is composed of two transition metals, which may improve activity for the reduction of CO2 and H2O. A series of spinel oxides have been synthesized and tested in co-electrolysis mode. A good candidate, CuFe2O4, was found and achieved a current density higher than 1 A/cm2 in CO2/H2O co-electrolysis with a fuel composition of 30%CO2/30%H2O-Ar at 800 °C, although the product was enriched in H2. This material presents superior Coulombic (Faradaic) efficiency for CO + H2 gas products, reaching more than 95%. It shows stable and reversible I-V curves, indicating good electrochemical cell performance in the co-electrolysis operation. In addition, a uniform porous structure with fine particles was observed after co-electrolysis, which may be associated with the stable and reversible electrochemical cell performance observed.
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U2 - 10.1016/j.ssi.2018.11.008
DO - 10.1016/j.ssi.2018.11.008
M3 - Article
AN - SCOPUS:85057194731
SN - 0167-2738
VL - 329
SP - 46
EP - 51
JO - Solid State Ionics
JF - Solid State Ionics
ER -