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

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 NiFeO@FeOOH composite electrocatalyst for the oxygen evolution reaction. The unique morphology of the NiFeO 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 at a low overpotential of 255 mV with outstanding stability at a current density of 100 mA cm for 300 h.

Highly Efficient Oxygen Evolution Reaction Enabled by Phosphorus Doping of the Fe Electronic Structure in Iron-Nickel Selenide Nanosheets.

The electronic structure of active sites is critically important for electrochemical reactions. Here, the authors report a facile approach to independently regulate the electronic structure of Fe in Ni Fe Se by P doping. The resulting electrode exhibits superior catalytic performance for the oxygen evolution reaction (OER) showing a low overpotential (238 mV at 100 mA cm , 185 mV at 10 mA cm ) and an impressive durability in an alkaline medium.