T. Kesslera, A.M. Castro Luna,b,*W.E. Triacab
a) Facultad de Ingeniería. Universidad Nacional del Centro de la Provincia de Buenos Aires, Avda. Del Valle 5737 (7400) Olavarría-Argentina.
b) Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Suc 4 CC 16 (1900) La Plata–Argentina.
Received 09 March 2004; accepted in revised form 12 May 2004
]]> Abstract
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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*Corresponding author. E-mail address: castrolu@inifta.unlp.edu.ar.
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