Atomically dispersed Fe-O 4 -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 H 2 O 2 . Nevertheless, its sluggish kinetics and limited selectivity hinder its practical application. Herein, single Fe atoms anchored on graphene oxide (SA Fe/GO) with Fe-O 4 -C sites are developed as an efficient electrocatalyst for the electro-synthesis of H 2 O 2 . These Fe-O 4 -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 H 2 O 2 production of 0.60 mg cm -2 h -1 at 0.4 V. Remarkably, it achieves a remarkable H 2 O 2 selectivity of over 95.5%.