Electrochemical production of hydrogen peroxide by non-noble metal-doped g-CN under a neutral electrolyte

Electrochemical oxygen reduction (ORR) for the production of clean hydrogen peroxide (H 2 O 2 ) is an effective alternative to industrial anthraquinone methods. The development of highly active, stable, and 2e − ORR oxygen reduction electrocatalysts while suppressing the competing 4e − ORR pathway is currently the main challenge. Herein, bimetallic doping was successfully achieved based on graphitic carbon nitride (g-C 3 N 4 ) with the simultaneous introduction of K and Co, whereby 2D porous K-Co/CNNs nanosheets were obtained. The introduction of Co promoted the selectivity for H 2 O 2 , while the introduction of K not only promoted the formation of 2D nanosheets of g-C 3 N 4 , but also inhibited the ablation of H 2 O 2 by K-Co/CNNs. Electrochemical studies showed that the selectivity of H 2 O 2 in K-Co/CNNs under neutral electrolyte was as high as 97%. After 24 h, the H 2 O 2 accumulation of K-Co/CNNs was as high as 31.7 g L −1 . K-Co/CNNs improved the stability of H 2 O 2 by inhibiting the ablation of H 2 O 2 , making it a good 2e − ORR catalyst and providing a new research idea for the subsequent preparation of H 2 O 2 . Electrochemical oxygen reduction (ORR) for the production of clean hydrogen peroxide (H 2 O 2 ) is an effective alternative to industrial anthraquinone methods.