Constructing a high-entropy nanoalloy by molten salt electroreduction for efficient bifunctional oxygen electrocatalysis

Abstract

High-entropy nanoalloys are reported to be highly efficient and stable bifunctional oxygen catalysts, which are important for the sustainable application of rechargeable zinc–air batteries. However, phase separation is a common issue in the preparation of high-entropy nanoalloys. Herein, a high-entropy nanoalloy was successfully constructed using the molten salt electroreduction method. The bifunctional oxygen overpotential (ΔE) of the catalyst is as low as 0.72 V. The zinc–air battery assembled with this catalyst exhibits exceptional peak power density (216.7 mW cm⁻²) and specific capacity (784.4 mAh g⁻¹), with a cycling stability exceeding 1200 hours, among the best values reported to date in the field.