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In this study, a fiber-shaped Co coating was electroplated on the Cu surface followed by the deposition of Pt crystallites using the galvanic displacement method. The electrochemical behavior of the prepared Co fiber and Pt nanoparticles decorated Co fiber catalysts were evaluated in order to provide insights into the electro-oxidation of N 2 H 4 in an alkaline media was performed using cyclic voltammetry and chrono-techniques. The influence of Co fiber /Cu and PtCo fiber /Cu as the anode electrocatalyst on the performance of direct N 2 H 4 -H 2 O 2 fuel cell was investigated at different temperatures. The deposition of a small amount of Pt crystallites, in the range of 5 μg Pt cm -2 to 29 μg Pt cm -2 , significantly improved the performance of the fiber-shaped Co catalyst for the electro-oxidation of N 2 H 4 in an alkaline medium. The measured N 2 H 4 oxidation current densities at −0.2 V are approximately 5-6 times larger for different PtCo fiber /Cu catalysts, compared with that of a pure Co fiber /Cu. The single N 2 H 4 -H 2 O 2 fuel cell results showed that the highest peak power density of 219.8 mW cm -2 for the N 2 H 4 -H 2 O 2 fuel cell was obtained with the PtCo fiber /Cu catalyst that has the Pt loading of 28.7 μg Pt cm -2 .

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