Defect-interface coupling for stable lattice-oxygen-driven oxygen evolution at industrial current densities

For industrial water electrolysis, the development of active and stable catalysts for the oxygen evolution reaction remains a challenge. Here, we report a heterostructure catalyst composed of NiFe layered double hydroxide nanosheets anchored on pyramidal Fe2(MoO4)3 to activate lattice oxygen for efficient and durable oxygen evolution. Our investigation reveals that oxygen vacancies within the NiFe layered double hydroxide and the internal electrical field at the material interface optimize the electronic states, allowing oxygen atoms within the crystal lattice to participate directly in the reaction. The resulting heterostructured NiFe LDH/FeMoO catalysts possess high oxygen evolution reaction activity in 1 M…

• UO
  University of New South Wales
• NN
  National Natural Science Foundation of China

  Awards: 2022YFB3803600, 22372065
• HU
  Huazhong University of Science and Technology
• WN
  Wuhan National Laboratory for Optoelectronics
• AR
  Australian Research Council

  Awards: DP220103294, IC200100023, CE230100017
• NK
  National Key Research and Development Program of China

  Award: 2022YFB3803600