PtCoNi Alloy Towards Efficient Oxygen Reduction Reaction

Abstract

A ternary alloy catalyst, CoNi-Pt/C-600, was prepared using a simple polyol method and thermal annealing treatment, and its oxygen reduction reaction (ORR) performance in acidic medium was studied.X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) were used to characterize the structure and morphology of the catalyst particles. These techniques provided information on the structure and morphology of the catalyst. Electrochemical testing was conducted to evaluate the ORR activity and stability of the catalyst. CoNi-Pt/C-600 was compared with JM Pt/C. The results showed that the mass activity (MA) of CoNi-Pt/C-600 was 1.87 times higher than that of JM Pt/C (CoNi-Pt/C-600: 174.02 mA/mgPt, JM Pt/C: 93.22 mA/mgPt). The specific activity (SA) of CoNi-Pt/C-600 was 3.60 times higher than that of JM Pt/C (CoNi-Pt/C-600: 0.6537 mA/m2Pt, JM Pt/C: 0.1814 mA/m2Pt). This indicates that CoNi-Pt/C-600 exhibits better ORR activity. Furthermore, durability testing demonstrated the superior electrocatalytic performance of CoNi-Pt/C-600. In conclusion, this study successfully prepared a ternary alloy catalyst, CoNi-Pt/C-600, with excellent ORR activity and stability. This research provides valuable reference for the development of efficient catalysts for the oxygen reduction reaction.