One-step conversion from Ni/Fe polyphthalocyanine to N-doped carbon supported Ni-Fe nanoparticles for highly efficient water splitting

Nitrogen-doped carbon supported nickel-iron nanoparticle electrocatalysts (NiFe@NC) is prepared by one-step conversion from cross-linked polyphthalocyanine under the direct pyrolysis treatment. The resultant NiFe@NC electrocatalysts exhibit the efficient catalytic activity and durability for both OER and HER as bi-functional electrodes in water splitting device. The water splitting device based on the same NiFe@NC electrocatalyst at both sides of anode and cathode operated at the low cell voltage (1.81 V, at 10 mA cm-2) in 1 M KOH aqueous electrolyte, as well as excellent durability (over 15 h of operation at 8, 10 and 20 mA cm-2) and high reversibility.393