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

Abstract

Abstract 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‐C3N4 nanosheets (Pt0.21/CN) has been successfully achieved. The obtained Pt0.21/CN catalyst shows excellent two‐electron oxygen reduction (2e− ORR) capability for hydrogen peroxide (H2O2). Compared with CN, its H2O2 selectivity increased from 80% to 98% in 0.1 M KOH, surpassing those in most of the reported studies. Besides, the H2O2 production rate of Pt0.21/CN is 767 mmol gcat−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.

Keywords

• g‐C3N4
• hydrogen peroxide
• platinum
• single‐atom
• two‐electron oxygen reduction reaction