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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3269

Title: Effect of P on the electrochemical activity of carbon supported Pt-Ru alloy catalyst for methanol oxidation.
Authors: Mohlala, M
Modibedi, M
Mathe, MK
Keywords: Methanol electrooxidation
Phosphor
Ruthenium
Linear chronoamperometry
Issue Date: Nov-2007
Publisher: Catalysis Society of South Africa (CATSA) 2007
Citation: Mohlala, M, Modibedi, M and Mathe, MK. 2007. Effect of P on the electrochemical activity of carbon supported Pt-Ru alloy catalyst for methanol oxidation. Catalysis Society of South Africa (CATSA) Conference. Richards Bay, South Africa, 11-14 November 2007, pp 1
Abstract: In polymer electrolyte membrane fuel cell (PEMFC), platinum is recognized to be the most active metal for methanol oxidation, however there is a strong CO adsorption tendency, which blocks the surface for further methanol adsorption and leads to very low power densities [1, 2]. Pt-Ru and Pt-Sn are the most promising of the binary catalysts for methanol and ethanol oxidation respectively due to the improved CO tolerance. On the other hand, the power densities of Pt-Ru and Pt-Sn anode catalysts for direct alcohol fuel cell is lower than that of the hydrogen PEMFC [3, 4, and 5]. This study aims at improving the performance of the binary catalyst through the addition of phosphorus group following the sodium hypophosphite method [6]. The optimum amount of phosphorus on the Pt-Ru/C, Pt-Sn/C and Pt-Ir/C was investigated by measuring the activity of the catalysts for methanol electrooxidation with cyclic voltammetry and linear chronoamperometry
Description: Catalysis Society of South Africa (CATSA) Conference. Richards Bay, South Africa, 11-14 November 2007
URI: http://hdl.handle.net/10204/3269
Appears in Collections:General science, engineering & technology

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