Electrochemical Impedance Study of Membrane-Electrode Assemblies in PEM Fuel Cells. II. Electrooxidation of H2 and H2/Co Mixtures on Pt/Ru-Based Gas-Diffusion Electrodes

Journal of Physical Chemistry B

Volumn 103, Issue 44, 1999, Pages 9645-9657

  Ciureanu, Mariana ^a   Wang, Hong ^a   Qi, Zhigang ^b  

^a H Power Enterprises of Canada   (Canada)

^b H Power   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000928854     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp9918407     Document Type: Article

References (33)

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31. 2 Pt.
32. One should note however, that this criterion cannot be absolutized, since on blocked electrodes, the nonlinear diffusion problem is mathematically the same as for linear diffusion coupled with a first-order homogeneous reaction. It is mainly a comparison of the behavior of the impedance components in different potential ranges that seems to support the above idea.
33. 4-6 there is no difference in the CO adsorption affinity on Pt and Ru, but on Ru, the formation of oxygenated species is energetically favored over CO adsorption.