Design and Preparation of NiFe2O4@FeOOH Composite Electrocatalyst for Highly Efficient and Stable Oxygen Evolution Reaction

Abstract

Rational design and constructing earth-abundant electrocatalysts for efficient electrocatalytic water splitting is a crucial challenge. Herein, we report a simple and efficient one-step electrochemical synthetic route of the NiFe2O4@FeOOH composite electrocatalyst for the oxygen evolution reaction. The unique morphology of the NiFe2O4 nanoflowers loaded on FeOOH nanosheets allows more active sites to be exposed and promote charge transfer as well as gas release, and the resulting electrode enables a current density of 10 mA cm−2 at a low overpotential of 255 mV with outstanding stability at a current density of 100 mA cm−2 for 300 h.

NiFe2O4 Material on Carbon Paper as an Electrocatalyst for Alkaline Water Electrolysis Module

“…On the other hand, due to their low cost, high abundance, and excellent corrosion resistance in alkaline environments, transition metal oxides have been extensively developed as OER (oxygen evolution reaction) catalysts [ 28 ]. Ni- and Fe-based metal oxides, like NiFe 2 O 4 , have been demonstrated as an efficient OER catalyst for anion exchange membrane water electrolysis modules [ 62 , 63 ]. In our synthesized material, it contains NiFe 2 O 4 with a small proportion of NiFe-MOF.…”