Self‐Derivation and Surface Reconstruction of Fe‐Doped Ni 3 S 2 Electrode Realizing High‐Efficient and Stable Overall Water and Urea Electrolysis

Abstract Exploring earth‐abundant, highly effective, and stable electrocatalysts for overall water and urea electrolysis is urgent and essential for developing hydrogen energy technology. Herein, a simple self‐derivation method is used to fabricate a Fe‐doped Ni 3 S 2 electrode. The electrode exhibits an impressive trifunctional catalyst, with low overpotentials of 290, 198, and 254 mV at 100 mA cm −2 for the oxygen evolution reaction (OER), urea oxidation reaction (UOR), and hydrogen evolution reaction (HER). The durability is higher than 3500 h (146 days) at 100 mA cm −2 for the OER without obvious change. In situ Raman spectra reveal the incorporation of Fe inhibited S dissolution and facilitates the…

• NN
  National Natural Science Foundation of China

  Awards: 11875207, 11522543, 12105207
• NS
  Natural Science Foundation of Hubei Province

  Award: 2020CFA041,2020CFB393
• KT
  Key Technologies Research and Development Program

  Award: 2018YFB1502003
• NK
  National Key Research and Development Program of China
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2042022kf1184