One-step synthesis of cobalt-doped MoS2 nanosheets as bifunctional electrocatalysts for overall water splitting under both acidic and alkaline conditions

Cobalt-doped MoS2 nanosheets were prepared via a facile hydrothermal method, exhibiting bifunctional activities of hydrogen and oxygen evolution reactions in both acidic and alkaline media. Cobalt doping not only improves the conductivity, decreasing the hydrogen adsorption free energy of MoS2 for HER, but also contributes catalytic active sites for OER.