Solvothermally fabricated cobalt selenide supported on graphitic carbon nitride for enhanced oxygen evolution reaction.

Potentially superior to rare earth metal-containing electrocatalysts for the oxygen evolution reaction electrolysis, transition metal chalcogenides have yet to reach a catalytic activity that would allow them to be extensively adopted. In light of this, it is crucial to develop coherent designs for transition metal-based electrocatalysts on conducting polymer support to achieve high-efficiency OER. Herein, we present an easy solvothermal synthesis and exceptional catalytic performance of CoSe@gCN as an OER electrocatalyst in basic media. The synthesized materials were observed by various analysis. The phase composition confirmed by the X-rays diffraction (XRD) technique and further morphological analysis indicates the morphology of CoSe@gCN, which are considered responsible for revealing a great number of active spots and enhanced electrochemically active surface area. On the other hand, superior OER crusade and stability of the CoSe@gCN electrode with (overpotential of 174 mV, Tafel slope of 57 mV dec−1) in 1.0 M basic KOH are caused by the NF's excellent conductivity and highly porous framework, and a higher value of specific surface area. It also maintained high stability for almost 20 h, showing the higher OER activity in industrial application. As a result, our findings interpret that the transition metal chalcogenides with certain morphology can enhance electrocatalytic efficiency with graphitic carbon nitride, which demonstrates its potential for stable and sustainable energy production. [ABSTRACT FROM AUTHOR]