Oxygen reduction in acid media: influence of the activity of CoNPc(1,2) bilayer deposits in relation to their attachment to the carbon black support and role of surface groups as a function of heat treatment

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Biloul, A. and Contamin, O. and Scarbeck, G. and Savy, M. and Palys, B.J. and Riga, J. and Verbist, J. (1994) Oxygen reduction in acid media: influence of the activity of CoNPc(1,2) bilayer deposits in relation to their attachment to the carbon black support and role of surface groups as a function of heat treatment. Journal of Electroanalytical Chemistry, 365 (1-2). pp. 239-246. ISSN 1572-6657

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Abstract:O2 reduction was investigated using rotating disk electrode and voltammetry techniques on NPcCo(1,2) impregnations deposited onto two kinds of carbon black support. They were selected on the basis of their similar pH and dibuthylphthalate (DBP) adsorption values. Samples were also characterized by IR and X-ray photoelectron spectroscopy techniques. An optimized thermal treatment yielded an improvement in the O2 reducibility and identical activities (with N = 3.8) on both supports. These spectroscopic methods revealed a bilayer structure and suggested the presence of two sorts of site (active and inactive) which differed in their attachment of the substrate via surface groups which were characterized.
Item Type:Article
Copyright:© 1994 Elsevier Science
Link to this item:http://purl.utwente.nl/publications/57383
Official URL:http://dx.doi.org/10.1016/0022-0728(93)02980-V
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