Synergistic catalysis of graphitic carbon nitride supported bimetallic sulfide nanostructures for efficient oxygen generation.

Herein, a series of g-C 3 N 4 supported bimetallic sulfide nanostructures (Ni 3 S 2 /MoS 2 / n g-C 3 N 4 , n = 10, 20 and 30) was prepared by a hydrothermal method and subsequently a thermal annealing approach. Ni 3 S 2 /MoS 2 /20g-C 3 N 4 with controlled composition exhibits efficient OER activity with a low overpotential of 183 mV at 10 mA cm -2 , which outperforms the vast majority of sulfide OER electrocatalysts reported previously.