Electrochemical Oxidation of H2 and H2 ∕ CO Mixtures in Higher Temperature ( T cell 100 ° C ) Proton Exchange Membrane Fuel Cells: Electrochemical Impedance Spectroscopy

作者: Ruichun Jiang , H. Russell Kunz , James M. Fenton

DOI: 10.1149/1.1928067

关键词:

摘要: Electrochemical impedance spectroscopy (EIS) of the electrochemical oxidation H 2 and /CO mixtures on proton exchange membrane fuel cell anode (Pt-Ru/C or Pt/C electrocatalysts) was performed at higher temperature (T c e l > 100°C) ambient pressure. Anode polarization studies were also conducted with same mixture-fed streams. Both provide information mechanism mixtures. The spectra are presented compared various CO concentrations (0-500 ppm, 1 2%), temperatures (80-120°C), relative humidity conditions (35-100%), as well different dc bias potentials for characterizing tolerance electrocatalysts. poisoning is alleviated by increasing temperature, plays a strong role in EIS polarization. spectrum poisoned strongly dependent potential. Under certain potential conditions, pseudoinductive behavior appears complex plots, corresponding to onset indicated from

参考文章(41)
Mariana Ciureanu, Raymond Roberge, Electrochemical Impedance Study of PEM Fuel Cells. Experimental Diagnostics and Modeling of Air Cathodes Journal of Physical Chemistry B. ,vol. 105, pp. 3531- 3539 ,(2001) , 10.1021/JP003273P
G. Ertl, M. Neumann, K.M. Streit, Chemisorption of CO on the Pt(111) surface Surface Science. ,vol. 64, pp. 393- 410 ,(1977) , 10.1016/0039-6028(77)90052-8
V.A Paganin, C.L.F Oliveira, E.A Ticianelli, T.E Springer, E.R Gonzalez, Modelistic interpretation of the power response of a polymer electrolyte fuel cell Electrochimica Acta. ,vol. 43, pp. 3761- 3766 ,(1998) , 10.1016/S0013-4686(98)00135-2
Yongchao Si, H. Russell Kunz, James M. Fenton, Nafion-Teflon- Zr ( HPO 4 ) 2 Composite Membranes for High-Temperature PEMFCs Journal of The Electrochemical Society. ,vol. 151, pp. 623- 631 ,(2004) , 10.1149/1.1651527
Xin Wang, I.-Ming Hsing, Kinetics investigation of H2/CO electro-oxidation on carbon supported Pt and its alloys using impedance based models Journal of Electroanalytical Chemistry. ,vol. 556, pp. 117- 126 ,(2003) , 10.1016/S0022-0728(03)00337-1
J.M. Song, S.Y. Cha, W.M. Lee, Optimal composition of polymer electrolyte fuel cell electrodes determined by the AC impedance method Journal of Power Sources. ,vol. 94, pp. 78- 84 ,(2001) , 10.1016/S0378-7753(00)00629-7
M Eikerling, A.A Kornyshev, Electrochemical impedance of the cathode catalyst layer in polymer electrolyte fuel cells Journal of Electroanalytical Chemistry. ,vol. 475, pp. 107- 123 ,(1999) , 10.1016/S0022-0728(99)00335-6
Brian Evans Conway, John O'Mara Bockris, Modern aspects of electrochemistry Published in <b>1971</b> - <b>1973</b> in London by Butterworths. ,(1971)
J. Barber, S. Morin, B.E. Conway, Specificity of the kinetics of H2 evolution to the structure of single-crystal Pt surfaces, and the relation between opd and upd H Journal of Electroanalytical Chemistry. ,vol. 446, pp. 125- 138 ,(1998) , 10.1016/S0022-0728(97)00652-9
B. N. Grgur, N. M. Markovic, P. N. Ross, The Electro‐oxidation of H 2 and H 2 / CO Mixtures on Carbon‐Supported Pt x Mo y Alloy Catalysts Journal of The Electrochemical Society. ,vol. 146, pp. 1613- 1619 ,(1999) , 10.1149/1.1391815