The corrosion resistant Pt5Ce–CeO2 structure provides significant oxygen reduction catalysis

Platinum-based alloy catalysts have been extensively studied in the oxygen reduction reaction (ORR) because of their excellent performance. In this study, Pt 5 Ce–CeO 2 /C composite catalysts were synthesized by polyol reduction method and high-temperature calcination method. Owing to the dual effects of the alloying effect of forming Pt 5 Ce intermetallic compound and the electronic effect of CeO 2 modulating the electronic structure of Pt, it exhibits further improved ORR performance than the commercial Pt/C catalysts. The material possesses a 1.0 V starting potential, a 0.83 V half-wave potential, high durability, and methanol resistance. It has strong ORR catalytic activity and works well in Zn-air batteries. The experimental findings demonstrate that metal oxide and alloy structure can be combined to enhance catalyst ORR performance.