Abstract
In this research, three Pd decorated Ni and Co catalyst nanoparticle were synthesized on reduced graphene oxide (rGO) supports are synthesized through a facile solvothermal procedure. Borohydride oxidation reaction (BOR) activity and performance of prepared electrocatalysts respect to NaBH4 oxidation is evaluated by various electrochemical techniques in the three-electrode and the fuel cell configuration. Among the prepared catalysts, Pd10–Ni45–Co45/rGO exhibits the highest BOR activity. The cyclic voltammograms showed that the measured current at 0.5 V for the electrode of Pd10–Ni45–Co45/rGO is as much as 108 mA cm−2 higher than Pd10–Ni90/rGO and 185 mA cm−2 higher than Pd10Co90/rGO. X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectra were employed to study the morphology and crystal structure of the prepared catalyst. The results of DBFC test show that the Pd10–Ni45–Co45/rGO nanoparticles as anodic catalyst, enhanced power density to 50.4 mW cm−2 which is 10.5% and 45.2% higher than power density of DBFCs with Pd10–Ni90/rGO (45.6 mW cm−2) and Pd10Co90/rGO (34.7 mW cm−2) anode catalysts, respectively. These results indicate that the competency of operating procedure for assembling nickel alloys electrodes can improve the activity of the prepared catalysts for BOR considerably.
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