Surface Activation and Ni‐S Stabilization in NiO/NiS 2 for Efficient Oxygen Evolution Reaction

Abstract Manipulating the active species and improving the structural stabilization of sulfur‐containing catalysts during the OER process remain a tremendous challenge. Herein, we constructed NiO/NiS 2 and Fe−NiO/NiS 2 as catalyst models to study the effect of Fe doping. As expected, Fe−NiO/NiS 2 exhibits a low overpotential of 270 mV at 10 mA cm −2 . The accumulation of hydroxyl groups on the surface of materials after Fe doping can promote the formation of highly active NiOOH at a lower OER potential. Moreover, we investigated the level of corrosion of M−S bonds and compared the stability variation of M−S bonds with Fe at different locations. Interestingly, Fe bonded with S in the bulk as the sacrificial…

• NN
  National Natural Science Foundation of China

  Awards: 21922105, 21931001
• HE
  Higher Education Discipline Innovation Project

  Award: B20027
• NK
  National Key Research and Development Program of China

  Award: 2021YFA1501101
• FR
  Fundamental Research Funds for the Central Universities

  Awards: lzujbky-2021-it12, lzujbky-2021-pd04, lzujbky-2021-sp62, lzujbky-2021-37
• SF
  Special Fund Project of Guiding Scientific and Technological Innovation Development of Gansu Province

  Award: 2019ZX-04