The study reports the use of nitrogen-doped carbon nanomaterials as efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. These materials, synthesized from a nitrogen-rich polymer, exhibit a current density of 10 mA cm\(^{-2}\) at an overpotential of 0.38 V, comparable to iridium and cobalt oxide catalysts. The high OER activity is attributed to pyridinic-nitrogen and quaternary-nitrogen-related active sites. The findings suggest that non-metal catalysts can be a potential alternative to transition metal-based catalysts, offering a more sustainable and cost-effective solution for renewable energy technologies such as solar fuel synthesis and hydrogen production for fuel cells.The study reports the use of nitrogen-doped carbon nanomaterials as efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. These materials, synthesized from a nitrogen-rich polymer, exhibit a current density of 10 mA cm\(^{-2}\) at an overpotential of 0.38 V, comparable to iridium and cobalt oxide catalysts. The high OER activity is attributed to pyridinic-nitrogen and quaternary-nitrogen-related active sites. The findings suggest that non-metal catalysts can be a potential alternative to transition metal-based catalysts, offering a more sustainable and cost-effective solution for renewable energy technologies such as solar fuel synthesis and hydrogen production for fuel cells.