TY - JOUR
T1 - Effect of chromium poisoning on the electrochemical properties of NdBaCo2O5+δ cathode for IT-SOFCs
AU - Gu, Haitao
AU - Chen, Han
AU - Zheng, Yifeng
AU - Guo, Lucun
PY - 2010/3
Y1 - 2010/3
N2 - The effect of the Cr poisoning on the electrochemical properties of NdBaCo2O5+δ cathode for IT-SOFCs was investigated by the electrochemical impedance spectroscopy (EIS) and the cathodic polarization analysis. With the Cr poisoning, the area-specific resistances (ASRs) increased at 500-600 °C and did not increase with the increasing temperature. The Cr poisoning made a negative effect on the oxygen reduction reaction (ORR) below 600 °C. Besides, the Cr poisoning decreased the exchange current density i0. The activation energies of i0 were higher than those of the ASRs, indicating that the charge transfer process was the rate-determining step for the ORR. With or without the Cr poisoning, the polarization curves were independent of the on the sweep rate, indicating that there were no mass transport limitations on the ORR rate. Hence, the Cr poisoning deteriorated the charge transfer process of the ORR for NdBaCo2O5+δ and decreased the ORR activity.
AB - The effect of the Cr poisoning on the electrochemical properties of NdBaCo2O5+δ cathode for IT-SOFCs was investigated by the electrochemical impedance spectroscopy (EIS) and the cathodic polarization analysis. With the Cr poisoning, the area-specific resistances (ASRs) increased at 500-600 °C and did not increase with the increasing temperature. The Cr poisoning made a negative effect on the oxygen reduction reaction (ORR) below 600 °C. Besides, the Cr poisoning decreased the exchange current density i0. The activation energies of i0 were higher than those of the ASRs, indicating that the charge transfer process was the rate-determining step for the ORR. With or without the Cr poisoning, the polarization curves were independent of the on the sweep rate, indicating that there were no mass transport limitations on the ORR rate. Hence, the Cr poisoning deteriorated the charge transfer process of the ORR for NdBaCo2O5+δ and decreased the ORR activity.
KW - Cr poisoning
KW - Electrochemical impedance spectroscopy
KW - Exchange current density
KW - Oxygen reduction reaction
KW - Solid oxide fuel cells
UR - http://www.scopus.com/inward/record.url?scp=76749096686&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2010.01.023
DO - 10.1016/j.ijhydene.2010.01.023
M3 - 文章
AN - SCOPUS:76749096686
SN - 0360-3199
VL - 35
SP - 2457
EP - 2462
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 6
ER -
