Abstract
The energy crisis globally has severely damaged the economy of the globe which forces researchers and scientists to provide a new promising technology. Also, the rapid depletion of fossil fuels leads to an energy crisis & environmental concern, because of this, economic stress is created for the people of the world. To overcome these, water splitting is sustainable and renewable energy, but it requires active electrocatalysts. The nanostructure material morphology characterization was investigated by the, XRD, EDS, SEM, HRTEM, EELS chemical composition maps through & XPS which properly reveal the nanocomposite materials morphology strongly aggregates. The materials exhibit outstanding OER response as compared to Co3O4 & manganese sulfide due to the synergetic effect produced in the composite materials including fast charge transport from MoSOX, active sites & high density of Co3O4, which accelerates the OER kinetics. Between the composites, Co3O4-MoSOX with the greatest amount of Co3O4 (S4 0.7g) content owns the lower overpotential to produce OER kinetics & having a 60 mV dec−1 and Tafel slope of as compared to other material. Further, for the exchange of current density of 2.97 × 10−3A/cm2 & it is extremely durable for 45 h. The EIS ensure the fast charge transport for the extra addition of pristine S4 (0.7g) in the composite, which potentially enhanced the production of the OER kinetics activity. In this regard transition metal oxide especially, Co3O4 is promising material, but it requires certain strategies to improve its catalytic kinetics activity & stability for the full water splitting. Keeping these challenges, the proposed study is of great concern to economical and societal needs, which can lead to a boost in the electrochemical applications in particular oxygen evolution reaction (OER). Therefore, rapid efforts must be made to realize the nonprecious catalysts for water splitting and equality compete with the world in the hydrogen/electron economy.
•An overview of existing challenges and future directions for the electrochemical water splitting.•Efficient Co3O4/MoSOX catalyst excites towards the excellent activity for OER at low overpotentials.•The Tafel slope of Co3O4/MoSOX, stands 60 mV dec−1.•The Co3O4/MoSOX having exchange of current density of 2.97 × 10−3A/cm2.•Co3O4/MoSOX electrodes demonstrated an enhanced rate performance for the OER.