Atomically dispersed Fe-O₄-C sites as efficient electrocatalysts for electrosynthesis of hydrogen peroxide

The electrochemical reduction of oxygen via the 2e pathway is an environmentally friendly approach to the electrosynthesis of H₂O₂. Nevertheless, its sluggish kinetics and limited selectivity hinder its practical application. Herein, single Fe atoms anchored on graphene oxide (SA Fe/GO) with Fe-O₄-C sites are developed as an efficient electrocatalyst for the electro-synthesis of H₂O₂. These Fe-O₄-C site active centres could efficiently enhance the activity and selectivity towards 2e electrochemical oxygen reduction in an alkaline environment. The newly-developed SA Fe/GO electrocatalyst demonstrates exceptional electrochemical performance, exhibiting impressive activity with an onset potential of 0.90 and H₂O₂ production of 0.60 mg cm^-2 h^-1 at 0.4 V. Remarkably, it achieves a remarkable H₂O₂ selectivity of over 95.5%.