Modification of carbon supported catalysts to improve performance in gas diffusion electrodes

Modification of carbon supported catalysts to improve performance in gas diffusion electrodes

The effect of surface oxidation of the carbon support of Pt catalysts with nitric acid has been investigated. Oxidation of the support before deposition of the Pt leads to a decrease in the Pt particle size, as reported by others, and enhanced performance for oxygen reduction in gas diffusion electr...

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Veröffentlicht in:Electrochimica acta 2001-05, Vol.46 (18), p.2863-2869
Hauptverfasser: Jia, Nengyou, Martin, Rex B, Qi, Zhigang, Lefebvre, Mark C, Pickup, Peter G
Format: Artikel
Sprache:eng
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Carbon supported catalysts
Chemistry
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
Gas diffusion electrodes
General and physical chemistry
Other electrodes
Surface oxidation
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container_end_page 2869
container_issue 18
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container_title Electrochimica acta
container_volume 46
creator Jia, Nengyou
Martin, Rex B
Qi, Zhigang
Lefebvre, Mark C
Pickup, Peter G
description The effect of surface oxidation of the carbon support of Pt catalysts with nitric acid has been investigated. Oxidation of the support before deposition of the Pt leads to a decrease in the Pt particle size, as reported by others, and enhanced performance for oxygen reduction in gas diffusion electrodes. Oxidation of the support after Pt deposition produces an even greater enhancement in performance, which we have attributed to enhanced proton conductivity in the catalyst layer. It is speculated that hydrophilic carboxylic acid groups produced by surface oxidation enhance wetting of the catalyst layer.
doi_str_mv 10.1016/S0013-4686(01)00511-4
format Article
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subjects Carbon supported catalysts
Chemistry
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
Gas diffusion electrodes
General and physical chemistry
Other electrodes
Surface oxidation
title Modification of carbon supported catalysts to improve performance in gas diffusion electrodes
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