Ultra‐low single‐atom Pt on g‐C₃N₄ for electrochemical hydrogen peroxide production

Platinum‐based materials show excellent electrocatalytic performance and have good potential for use in fuel cells. However, the high cost and scarce reserves have restricted their wide application. Therefore, it is a challenging task to reduce the amount of Pt as well as ensure good catalytic performance. Herein, anchoring of Pt single atoms (0.21 wt‰) with ultra‐low content on g‐C 3 N 4 nanosheets (Pt 0.21 /CN) has been successfully achieved. The obtained Pt 0.21 /CN catalyst shows excellent two‐electron oxygen reduction (2e − ORR) capability for hydrogen peroxide (H 2 O 2 ). Compared with CN, its H 2 O 2 selectivity increased from 80% to 98% in 0.1 M KOH, surpassing those in most of the reported studies. Besides, the H 2 O 2 production rate of Pt 0.21 /CN is 767 mmol g cat −1 h −1 , which is 11.1 times that of CN. This work may pave the way toward the development of an effective method for the design of noble‐metal electrocatalysts with low metal loading and high catalytic activity.