Abstract
Here, we demonstrate a green and environment-friendly pyrolysis route for the synthesis of metal-rich sulphide embedded in an N-doped carbon (NC) framework in the absence of sulphide ions (S2−). The metal–chelate complex (tris(ethylenediamine) metal(II) sulfate) serves as a new and single source precursor for the synthesis of earth abundant and non-precious hybrid structures such as metal-rich sulphides Co9S8@NC and Ni3S2@NC when MII = Co2+ and Ni2+ and counter sulphate (SO42−) ions are the source of S. Both the hybrids show superior OER activity as compared to commercial RuO2.
