Advanced Layered Double Hydroxide-Based Electrocatalysts for Electrocatalytic Oxygen Evolution Reaction

Layered double hydroxides (LDHs) are the most promising candidates among all candidates for electrocatalytic water splitting, especially oxygen evolution reaction.Electrocatalytic activities of LDHs can be attuned by exfoliation, composition, morphology regulation and by intercalating some species.Moreover, exfoliation and flexible ion exchange can be tuned by the unique intercalation properties via flexible tunability of multiple metal cations.However, certain limitations like bulk thickness, large lateral size and low conductivity of LDHs decrease their uses in oxygen evolution reaction.In order to increase its electrocatalytic performances, researchers introduce different strategies such as combining the conductive materials to LDHs to introduce defects and tune the electronic structure of LDHs to enhance the active sites and increase intrinsic activity.In this minireview, we summarized current progress, strategies, challenges and prospective in the fabrication and designing of LDHs materials by various species.