TY - JOUR
T1 - Assessment of CO-tolerance for different Pt-alloy anode catalysts in a polymer electrolyte fuel cell using ac impedance spectroscopy
AU - Leng, Yong Jun
AU - Wang, Xin
AU - Hsing, I. Ming
N1 - Funding Information:
The authors gratefully acknowledge the Innovation and Technology Commission of The Hong Kong SAR Government (UIM 15) for the funding support.
PY - 2002/6/14
Y1 - 2002/6/14
N2 - Assessment of CO-tolerance for different anode catalysts (Pt/C, PtRu/C and PtSn/C) at 50°C and PtRu/C at different operating temperatures in the polymer electrolyte fuel cell (PEFC) was evaluated using ac impedance spectroscopy. Impedance measurements for the oxidation of a H2+2% CO mixture reported that at a critical potential (referred to as the onset potential), 'pseudo-inductive' behavior appears, the value of which is different for different anode catalysts (0.70, 0.45 and 0.30 V for Pt/C, PtRu/C and PtSn/C at 50°C, respectively) and strongly dependent upon working temperatures (0.50, 0.45 and 0.40 V for PtRu/C at 25, 50 and 70°C, respectively). Based on that, we proposed that this onset potential for the 'pseudo-inductive' behavior can be used as a new criterion for the evaluation of CO-tolerance for different anode catalysts at different operating temperatures.
AB - Assessment of CO-tolerance for different anode catalysts (Pt/C, PtRu/C and PtSn/C) at 50°C and PtRu/C at different operating temperatures in the polymer electrolyte fuel cell (PEFC) was evaluated using ac impedance spectroscopy. Impedance measurements for the oxidation of a H2+2% CO mixture reported that at a critical potential (referred to as the onset potential), 'pseudo-inductive' behavior appears, the value of which is different for different anode catalysts (0.70, 0.45 and 0.30 V for Pt/C, PtRu/C and PtSn/C at 50°C, respectively) and strongly dependent upon working temperatures (0.50, 0.45 and 0.40 V for PtRu/C at 25, 50 and 70°C, respectively). Based on that, we proposed that this onset potential for the 'pseudo-inductive' behavior can be used as a new criterion for the evaluation of CO-tolerance for different anode catalysts at different operating temperatures.
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U2 - 10.1016/S0022-0728(02)00916-6
DO - 10.1016/S0022-0728(02)00916-6
M3 - Article
AN - SCOPUS:0037076742
SN - 0022-0728
VL - 528
SP - 145
EP - 152
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1-2
ER -