In this work the influence of the electrochemical oxidation of different carbon substrates, such as glassy carbon, graphite cloth, graphite felt, and carbon fiber paper, on the electrodeposition of bimetallic PtRu catalysts was studied. The oxidation of the different substrates prior to the catalyst deposition, leads to remarkable improvement of catalyst dispersion, reduction of particle size and higher specific surface area of the catalyst, when was compared than that electrodes with the unnoxidized substrates. All the electrodes were used to study the methanol oxidation in acid media.
electrodeposition; bimetallic PtRu catalyst; carbon substrates; methanol
