Cobalt oxides demonstrate efficient catalytic properties as anode materials for oxygen evolution reaction (OER) in acidic media, but their structural stability is limited under open circuit or high potential applications. This scalable electrode composite (Co3O4@C/GPO) was made by mixing Co3O4@C, graphite (G), and paraffin oil (PO) in a specific ratio by weight. This type of anode composite sustains OER performance in 1M H2SO4 solution for over 40 hours. Due to the high porosity and large surface area of metal-organic frameworks (MOFs), they are applied for water splitting applications. Heteroatom doping and nanofabrication are utilized to enhance the catalytic properties of MOFs. Yun et al. revealed a bifunctional electrocatalysts, V doped Ni-Fe MOFs@graphene oxide, synthesized by vanadium doping and carbonization of bimetallic Ni-Fe MOFs. The V-Ni0.06Fe0.06 MOF/GO performed as a bifunctional electrocatalyst for HER and OER in the presence of an acidic or alkaline solution.