Abstract

KESSLER, T.; CASTRO LUNA, A.M.  and  TRIACA, W.E.. Methanol Electrooxidation on Pt-Ru Catalysts Dispersed in Conducting Polyaniline Films. Port. Electrochim. Acta [online]. 2004, vol.22, n.4, pp.361-374. ISSN 0872-1904.

Methanol electrooxidation was investigated on tailored Pt-Ru-polyaniline catalysts prepared applying dynamic potential routines. The electrodes characterized by SEM, EDX and TEM present a uniform distribution of metal particles about 100 nm in size, composed of Ru and Pt on the fibrous polymer matrix. The effect of concentration in the range 0.05-1 M and temperature in the range 20 to 60 ºC on the methanol electrooxidation rate was determined. The apparent activation energy depends on the catalyst Ru content.

Keywords : polyaniline; ruthenium; platinum; methanol oxidation; activation energy.

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