Abstract
In this study electrodeposition of Pd, PdCd, and PdBi nanostructures by chronoamperometry method on a glassy carbon electrode was investigated. The Field Emission Scanning Electron Microscopy revealed that the Pd(1) and Pd(2) samples have smaller particle sizes compared to the PdCd and PdBi samples. The energy dispersive X-ray spectroscopy and EDX mapping analyses were used to study morphology and elemental analysis of the studied samples. The X-ray diffraction analyses of PdCd and PdBi samples confirmed the formation of Pd2Cd3 and PdBi2 alloy phases respectively. The corrosion behavior and stability of the samples in 0.5 M sulfuric acid solution were investigated using Tafel polarization, and electrochemical impedance spectroscopy methods. The higher corrosion resistance of Pd(1) and Pd(2) samples compared to the PdCd and PdBi samples was observed. Besides, the electrodeposited samples were considered as the anode electro-catalysts for formic acid oxidation in 0.5 M sulfuric acid solution using cyclic voltammetry, linear sweep voltammetry, and chronoamperometry methods. The effect of potential scan rate, sulfuric acid, and formic acid concentrations was examined for the formic acid oxidation on the prepared catalysts. Based on the obtained results, the PdCd sample showed higher catalytic activity for formic acid oxidation compared to the other samples.
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