CoMn Layered Double Hydroxides/Carbon Nanotubes Architectures as High‐Performance Electrocatalysts for the Oxygen Evolution Reaction

Abstract High‐efficiency, earth‐abundant oxygen evolution reaction (OER) catalysts are highly desired and required for the half reaction of water splitting. Herein, an integrated system composed of CoMn layered double hydroxides (CoMn‐LDH) and carbon nanotubes (CNTs) were configured for the OER. Ultrathin CoMn‐LDH nanoplates can grow and assemble in situ on conducting CNT frameworks to form the CoMn‐LDH/CNT nanoarchitectures. The CNT frameworks provide conducting channels for fast charge transfer, whereas CoMn‐LDH features highly active sites and is capable of catalyzing the OER process. Benefiting from functional integration of the highly active CoMn‐LDH nanoplates and the strong coupling effects between ultrathin nanoplates and conducting CNT frameworks, the as‐made CoMn‐LDH/CNT nanohybrids achieve excellent OER performance with a small overpotential (355 mV at 10 mA cm −2 ), low Tafel slope (45 mV dec −1 ), and prominent electrochemical durability.