Promoting Surface Reconstruction of NiFe Layered Double Hydroxide for Enhanced Oxygen Evolution

Abstract A dynamic surface reconstruction of oxide electrocatalysts in alkaline media is widely observed especially for layered double hydroxide (LDH), but little is known about how to promote the reconstruction toward desired surfaces for improved oxygen evolution reaction (OER). Here, surface reconstruction of NiFe LDH nanosheets is successfully induced to a higher degree via in situ sulfur doping than that by natural electrochemical activation. Theoretical calculations, operando Raman, and various ex situ characterizations reveal the S anion‐induced effect can lower the energy barrier and facilitate the phase transformation into highly active S‐doped oxyhydroxides. The generated S‐Ni x Fe y OOH can optimize…

• MO
  Ministry of Education - Singapore

  Award: RG125/21
• NN
  National Natural Science Foundation of China

  Awards: 51872124, 6141A02022516
• MO
  Ministry of Education of the People's Republic of China

  Award: 6141A02022516
• CS
  China Scholarship Council

  Award: 202106780011