Fe-S dually modulated adsorbate evolution and lattice oxygen compatible mechanism for water oxidation

Simultaneously activating metal and lattice oxygen sites to construct a compatible multi-mechanism catalysis is expected for the oxygen evolution reaction (OER) by providing highly available active sites and mediate catalytic activity/stability, but significant challenges remain. Herein, Fe and S dually modulated NiFe oxyhydroxide (R-NiFeOOH@SO4) is conceived by complete reconstruction of NiMoO4·xH2O@Fe,S during OER, and achieves compatible adsorbate evolution mechanism and lattice oxygen oxidation mechanism with simultaneously optimized metal/oxygen sites, as substantiated by in situ spectroscopy/mass spectrometry and chemical probe. Further theoretical analyses reveal that Fe promotes the OER kinetics under…

• NN
  National Natural Science Foundation of China

  Awards: 22379117, 22075223
• WU
  Wuhan University
• WU
  Wuhan University of Technology

  Awards: 2023-ZT-1, 22075223
• SK
  State Key Laboratory of Advanced Technology for Materials Synthesis and Processing

  Award: 2023-ZT-1