Abstract

Polycrystalline Palladium-nickel alloy was successfully electrodeposited on gold disk of a rotating ring-disk electrode (RRDE) and on gold foils. The structure and morphology of the deposits were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Electrochemical measurements of cyclic voltammetry (CV) and RRDE measurement were also carried out to characterize the Pd-Ni alloy and the oxygen reduction reaction (ORR) on this alloy. The number of electrons transferred in a potential range of 0.36V to 0.04V was calculated to be between 2.1 to 3.3, and Tafel slope obtained was about 110mV/dec on this smooth polycrystalline Pd- Ni alloy surface. The tolerance of this alloy towards methanol oxidation was also investigated.

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