NiFe LDH@Super P Nanocomposite as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Key laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China.

^a* Corresponding author: liff@jlu.edu.cn
^b xuebing2011@jlu.edn.cn
^† These authors contributed equally to this work.

Abstract

NiFe LDH (Layered Double Hydroxide) is a promising electrocatalyst for oxygen release reaction (OER), which is currently receiving more and more attention. Here, we propose a simple method to enhance the OER activity of NiFe LDH supported on Super P. The NiFe LDH@Super P catalyst with a nanoflower nanostructure was successfully synthesized via pre-hydrothermal treatment method, which ensures the normal nucleation process of the highly active NiFe LDH precursor and significantly promote the full contact of NiFe LDH and Super P in the three-dimensional space. The as synthesized NiFe LDH@Super P-2h sample exhibited excellent OER performances in alkaline media, and the overpotential is only 260 mV at a current density of 10 mA · cm^-2. The outstanding OER electrocatalytic reaction performance is attributed to the unique three-dimensional nanoflower structure and excellent composite effect with Super P, which provides more specific surface areas and enables efficient transfer of electrons between them. This research work provides a simple and effective method for developing non-precious metal-based OER catalysts to replace expensive precious metal catalysts.