Bimetallic doping engineering of Ni 3 S 2 nanosheets originating from NiFe layered double hydroxide for efficient overall water splitting.

Fe, Mo-doped Ni 3 S 2 nanosheets that are derived from NiFe-LDH by structural transformation have been successfully developed. The obtained Fe, Mo-Ni 3 S 2 exhibits a low overpotential of 67 mV to enable a current density of 10 mA cm -2 for the HER and the overpotential for the OER is only 240 mV. Besides, the current density of 10 mA cm -2 can be achieved with a voltage of 1.53 V in a two-electrode hydrolysis device.