Abstract
In this research, different Pd-Cd alloy electrocatalysts (Pd6.3Cd, Pd2.6Cd, Pd1.1Cd, PdCd1.7, and PdCd5.6) were synthesized by a simple chemical method. The field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), EDX mapping, and X-Ray diffraction (XRD) techniques were employed for the characterization of the prepared samples. These electrocatalysts were deposited on the surface of the glassy carbon electrode and the obtained electrodes were employed for formic acid oxidation in sulphuric acid solution using electrochemical methods. Our results demonstrated that in comparison with the Pd sample, the prepared Pd-Cd alloys possessed higher electrocatalytic activity for formic acid oxidation. It was also found that the Pd6.3Cd sample was the best electrocatalyst with a mass activity of 597.06 mA mg−1Pd among all studied samples. This mass activity was significantly higher compared to the commercial Pd sample. Additionally, the Pd6.3Cd sample was the best sample against poisoning with adsorbed CO intermediate.
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