Extraction of nickel from NiFe-LDH into Ni 2 P@NiFe hydroxide as a bifunctional electrocatalyst for efficient overall water splitting

for overall water splitting at 1.51 V in 1.0 M KOH with long-term durability (100 h). This cell voltage is among the best reported values for bifunctional electrocatalysts. The results of theoretical calculations demonstrate that P-NiFe displays optimized adsorption energies for both HER and OER intermediates at the nickel active sites, thus dramatically enhancing its electrocatalytic activity.