Boosting OER Performance of NiFe‐MOFs via Heterostructure Engineering: Promoted Phase Transformation and Self‐optimized Dynamic Interface Electron Structure

Abstract How to manipulate heterostructure engineering to achieve high‐efficiency oxygen evolution reaction (OER) remains a significant challenge. Herein, a promising OER heterostructure electrocatalyst with IrNi nanoalloys (≈3.29 ± 0.12 nm) anchored on NiFe‐MOFs (IrNi@NiFe‐MOFs), exhibiting promoted phase transformation and self‐optimized dynamic interface electronic structure, via a one‐step hydrothermal method is designed and developed. Specifically, IrNi@NiFe‐MOFs displays excellent OER performance with a low overpotential of 228 mV at 10 mA cm −2 , a small Tafel slope of 37.6 mV dec −1 , and robust stability at 10 and 100 mA cm −2 . Experimental and theoretical calculations identify the actual active…

• UD
  U.S. Department of Energy
• NN
  National Natural Science Foundation of China

  Awards: 22221001, 22072062, 22202098
• OO
  Office of Science
• BE
  Basic Energy Sciences

  Award: DE−AC02−06CH11357