Cation‐Induced Deep Reconstruction and Self‐Optimization of NiFe Phosphide Precatalysts for Hydrogen Evolution and Overall Water Splitting

Abstract Surface reconstruction that produces real active species for catalytic reactions generally occurs during electrocatalytic water splitting, but overcoming the reconstruction level‐mass activity‐stability trade‐off is a grand challenge. A cation‐doping in conjunction with a geometrical topology strategy is proposed to concurrently realize deep reconstruction and self‐optimization of FeNi phosphide nanoarrays during an electrochemical activation process. The doped Zn cation induces a deep reconstruction of FeNiP@Fe 2 P precatalyst by continuously dissolving Fe 2 P and re‐depositing as amorphous FeOOH that solders Ni 2 P nanoparticles, forming small ultra‐thin nanosheets with abundant…

• NN
  National Natural Science Foundation of China

  Award: 52172088
• NS
  Natural Science Foundation of Hunan Province

  Award: 2021JJ30112