TY - JOUR
T1 - Intermediate temperature steam electrolysis using strontium zirconate-based protonic conductors
AU - Sakai, Takaaki
AU - Matsushita, Shotaro
AU - Matsumoto, Hiroshige
AU - Okada, Sachio
AU - Hashimoto, Shinichi
AU - Ishihara, Tatsumi
N1 - Funding Information:
This study was supported by the Industrial Technology Research Grant Program in 06A41502c from the New Energy and Industrial Technology Development Organization (NEDO) of Japan.
PY - 2009/1
Y1 - 2009/1
N2 - Steam electrolysis using SrZr0.9Y0.1O3-α (SZY-91) electrolyte was investigated. Different electrode materials, i.e., porous platinum, Sr0.5Sm0.5CoO3 (SSC-55) for the anode and nickel for the cathode were examined in order to achieve better energy performance. The electrodes had poor electrode activity when platinum was used for both the anode and the cathode, while the SSC-55 anode displayed significantly low overpotentials and the nickel cathode exhibited low overpotentials upon the introduction of an SrCe0.95Yb0.05O3-α (SCYb) interlayer. Moreover, a partial substitution of cerium for zirconium in the strontium zirconate electrolyte, i.e., SrZr0.5Ce0.4Y0.1O3-α (SZCY-541), was found to be effective for improving the current efficiency of the hydrogen evolution rate. Accordingly, the cell SSC-55|SZCY-541|SCYb|Ni exhibited much higher energy efficiency for the steam electrolysis than the Pt|SZY-91|Pt cell.
AB - Steam electrolysis using SrZr0.9Y0.1O3-α (SZY-91) electrolyte was investigated. Different electrode materials, i.e., porous platinum, Sr0.5Sm0.5CoO3 (SSC-55) for the anode and nickel for the cathode were examined in order to achieve better energy performance. The electrodes had poor electrode activity when platinum was used for both the anode and the cathode, while the SSC-55 anode displayed significantly low overpotentials and the nickel cathode exhibited low overpotentials upon the introduction of an SrCe0.95Yb0.05O3-α (SCYb) interlayer. Moreover, a partial substitution of cerium for zirconium in the strontium zirconate electrolyte, i.e., SrZr0.5Ce0.4Y0.1O3-α (SZCY-541), was found to be effective for improving the current efficiency of the hydrogen evolution rate. Accordingly, the cell SSC-55|SZCY-541|SCYb|Ni exhibited much higher energy efficiency for the steam electrolysis than the Pt|SZY-91|Pt cell.
KW - Oxide anode
KW - Steam electrolysis
KW - Strontium cerate interlayer
KW - Strontium zirconate
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U2 - 10.1016/j.ijhydene.2008.10.011
DO - 10.1016/j.ijhydene.2008.10.011
M3 - Article
AN - SCOPUS:57949087226
VL - 34
SP - 56
EP - 63
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 1
ER -
