TY - GEN
T1 - Electrochemical performance, microstructure and chemical compositions of Cu-based nanoparticles driven by exsolution of CuFe2O4 in CO2/H2O and H2O electrolysis
AU - Wu, K. T.
AU - Matsuda, J.
AU - Takagaki, A.
AU - Ishihara, T.
N1 - Funding Information:
The authors gratefully acknowledge the financial support of Grant-in-Aid Promoted Research (No. 16H06293) from MEXT through JSPS.
Publisher Copyright:
© The Electrochemical Society.
PY - 2019
Y1 - 2019
N2 - Use of perovskite as a cathode for solid oxide electrolysis cell is limited by its insufficient electrolysis current density or catalytic activity. Most of present perovskites used has a crucial drawback - significant segregation of A-site cations (i.e. SrO), likely resulting in the degradation of performance. In this work, spinel oxide of CuFe2O4, which is an alkline earth metal free oxide, is applied as the cathode material to investigate its electrochemical performance, microstructure and chemical composition in the electrolysis of CO2/H2O, steam and CO2. It was found that the exsolution of Cu nanoparticles was observed in CO2/H2O co-electrolysis and the microstructure of CuFe2O4 influenced significantly by operating in different CO2/H2O compositions. Despite the significantly microstructural variation of the CuFe2O4 layer, the cell performs relatively stable electrochemical performance in CO2/H2O and steam electrolysis.
AB - Use of perovskite as a cathode for solid oxide electrolysis cell is limited by its insufficient electrolysis current density or catalytic activity. Most of present perovskites used has a crucial drawback - significant segregation of A-site cations (i.e. SrO), likely resulting in the degradation of performance. In this work, spinel oxide of CuFe2O4, which is an alkline earth metal free oxide, is applied as the cathode material to investigate its electrochemical performance, microstructure and chemical composition in the electrolysis of CO2/H2O, steam and CO2. It was found that the exsolution of Cu nanoparticles was observed in CO2/H2O co-electrolysis and the microstructure of CuFe2O4 influenced significantly by operating in different CO2/H2O compositions. Despite the significantly microstructural variation of the CuFe2O4 layer, the cell performs relatively stable electrochemical performance in CO2/H2O and steam electrolysis.
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U2 - 10.1149/09101.2425ecst
DO - 10.1149/09101.2425ecst
M3 - Conference contribution
AN - SCOPUS:85073219003
T3 - ECS Transactions
SP - 2425
EP - 2432
BT - Solid Oxide Fuel Cells 16, SOFC 2019
A2 - Eguchi, K.
A2 - Singhal, S. C.
PB - Electrochemical Society Inc.
T2 - 16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
Y2 - 8 September 2019 through 13 September 2019
ER -