Dealloying the Ir–P Bond Coordination to Strengthen d–p Orbital Affinity for Efficient Anion Exchange Membrane Water Electrolyzer

ABSTRACT The d–p orbital hybridization of metal–based compounds can substantially impact their catalytic activity in water electrolysis. However, the metal‐nonmetal chemical bond may in turn bring down the electrical conductivity and catalytic charge transfer, leading to an activity‐kinetics trade‐off. The co‐effectuation of d–p hybridization and conductive metallic state is thus expectable to optimize the water‐splitting electrocatalysis, but challengeable. Herein, we profile a P‐doped Ir metallic (Ir‐P) structure by dealloying the IrP 2 nanocrystals for the water electrolysis studies. Such a IrP 2 →Ir‐P dealloying is found to neighbour the Ir d ‐band and P p ‐band centers to strengthen the d–p orbital…

• NN
  National Natural Science Foundation of China

  Award: 52371236