A polymer film on carbon electrodes is prepared by electropolymerisation of
1,5-dihydroxynaphthalene (1,5-DHN) in organic medium. The activity and sta
bility for methanol oxidation follow the order: C/Poly(1,5-DHN)-Pt > C/Poly
(1,5-DHN)/Pt >C/Pt. The higher activity and stability of the composite elec
trodes may be due to the dispersion of platinum particles in the polymeric
environment.