PdNiONF−Borophene Nanocomposite as a Promising Catalyst for Ethanol Electro‐Oxidation Reaction

Abstract

Abstract An electrocatalyst decorated with nickel oxide nanoflower and borophene (PdNiONF/B) has been presented as a possible catalyst for the ethanol oxidation reaction (EOR) in alkaline media. The crystal microstructure, composition, and morphology of the product were analyzed by using X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and Energy‐dispersive X‐ray spectroscopy (EDS). The catalytic activity of the PdNiONF/B for ethanol electrooxidation was assessed by using electrochemical impedance spectroscopy, cyclic voltammetry, and chronoamperometry. PdNiONF/B shows a high current at 0.12 mA as compared to palladium on carbon (Pd/C) and palladium on borophene (Pd/B) in 2 M of NaOH+ 2 M of EtOH. In addition, PdNiONF/B is stable and more tolerant of impurities. This observation suggests that PdNiONF/B possesses a better catalytic behavior. The ratio of the backward peak current (Ibwd) to the forward peak current (Ifwd) (Ibwd/Ifwd) in a 2 M of NaOH+2 M of EtOH is equal to (Ibwd/Ifwd) 1.0 V vs. Ag|AgCl for PdNiONF/B catalyst. This ratio indicates that PdNiONF/B has an excellent tolerance to ethanol intermediate species poisoning.

Keywords

• Electrocatalyst
• PdNiO nanoflower
• carbon co-catalyst
• ethanol electro-oxidation
• catalyst activity