Facile and cost-effective NiO/MgO-SiO composites for efficient oxygen evolution reaction and asymmetric supercapacitor systems.

Biomass waste from grapefruit peel extract was used for the preparation of MgO-SiO composites in order to develop effective electrocatalytic composites based on NiO/MgO-SiO. The MgO-SiO composites were subsequently deposited with NiO using a modified hydrothermal method. The synthesized materials were analyzed to investigate their morphology, crystal structure, chemical composition, functional group, and optical band gap.