Cobalt-doped Ni-Mn layered double hydroxide nanoplates as high-performance electrocatalyst for oxygen evolution reaction

NiMn LDH nanoplates with tunable cobalt doping content could be successfully prepared via a simple hydrothermal method. The doping content of cobalt in NiMn LDH nanoplates has a significant influence on their OER activities. The 21.1% Co-doped NiMn LDH exhibited excellent OER efficiency realizing an overpotential of 310 mV, Tafel plot of 59 mV/decade and a stable operating potential without fluctuating above 5 mV for 9 h. This work demonstrates a facile synthetic method and doping strategy for exploring electrocatalysts with remarkable OER performance, which will promote the development of transition-metal based hydroxides as high-performance electrocatalyst for water splitting.147