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Highly active electrocatalysts based on Layered Double Hydroxides (LDH) towards oxygen evolution reactions (OER) are required for the applications of renewable energy-conversion technology.The improvement of conductivity and electron-transporting capability for LDH materials remains an enormous challenge yet.Here,we synthesized carbon nanotube supported quaternary FeCoNiW-LDH ultrathin nanosheets with 1 nm thickness via one-pot hydrothermal methods,which exhibit enhanced OER activity due to the synergistic effect of modified CNTs and doped W6+ onto LDH nanosheets catalysts.The loaded carbon nanotubes can directly result in the improved conductivity.In addition,W6+ doping in LDH can modify the electronic structure and further enhance the conductivity of electrocatalysts.FeCoNiW-LDH/CNT exhibits a small overpotential (258 mV) at a current density of 10 mA·cm-2 and low Tafel slope (41 mV decade-1) towards OER in alkaline solutions,outperforming the noble metal RuO2 catalysts.