Nano-NiFe LDH assembled on CNTs by electrostatic action as an efficient and durable electrocatalyst for oxygen evolution

Abstract

The development of non noble metal electrocatalysts with high OER catalytic activity has become an urgent demand for water cracking. In this work, NiFe LDH nanobulks grown on CNTs were prepared by a green and simple one pot hydrothermal method. The acidified CNTs usually include hydroxyl, carboxyl and other oxygen-containing functional groups, which make the carbon tubes have a certain negative charge. The negatively charged CNTs can interact with the positively charged NiFe LDH nanobulks in an electrostatic manner, resulting in a self-assembly reaction to slow down the agglomeration of NiFe LDH nanobulks, better highlight the advantages of two-dimensional material structure, and expose greater specific surface area of activity. The introduction of CNTs can enhance the conductivity of the composite, accelerate the charge transfer in the reaction process, and further improve the OER catalytic performance of NiFe LDH/CNTs catalyst materials.