Descriptor-Driven Designed FeCoNiMoV High-Entropy Alloys for Exceptional Oxygen Evolution Activity

The oxygen evolution reaction (OER) generally relies on scarce noble electrocatalysts with low activity and stability. High-entropy alloys (HEAs) offer compositional flexibility to overcome these limitations; however, rational design principles and scalable synthesis methods are still lacking. Herein, we propose a strategy with descriptor-guided screening and core–shell metal–organic framework pyrolysis for developing FeCoNi-based HEA catalysts. The obtained FeCoNiMoV HEA catalysts achieve an exceptionally low overpotential in alkaline media (212 mV at 10 mA/cm2), with an ultralow Tafel slope (41.33 mV/dec) and excellent long-term stability. Our theoretical-experimental-combined scheme further reveals that the…

• NN
  National Natural Science Foundation of China

  Awards: 22173034, 52130101, 11974128
• SK
  State Key Laboratory of High Performance Ceramics and Superfine Microstructure

  Award: SKL202206SIC
• FR
  Fundamental Research Funds for the Central Universities
• PF
  Program for Jilin University Science and Technology Innovative Research Team

  Award: 2017TD-09