J. Mater. Sci. Technol. ›› 2025, Vol. 227: 76-81.DOI: 10.1016/j.jmst.2024.12.017

• Research article • Previous Articles     Next Articles

Accelerated O2 adsorption and stabilized *OOH for electrocatalytic H2O2 production

Danni Deng, Jinxian Wang, Meng Wang, Yuchao Wang, Jiabi Jiang, Yingbi Chen, Yu Bai, Qiumei Wu, Yongpeng Lei*   

  1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
  • Received:2024-10-30 Revised:2024-12-18 Accepted:2024-12-28 Online:2025-01-07
  • Contact: *E-mail address: leiyongpeng@csu.edu.cn (Y. Lei)

Abstract: Electrocatalytic hydrogen peroxide (H2O2) production via the two-electron oxygen reduction reaction (2e- ORR) is promising, but non-metal catalysts with high selectivity are lacking. Herein, a high content of pyrrolic N doped carbon (HPNC) with small mesopores is constructed. Over 80 % H2O2 selectivity at a wide potential of 0.2-0.6 V is achieved. The finite element simulation reveals that small pore-size mesopores are beneficial to O2 adsorption. And in-situ characterization proves that HPNC suppresses the breakage of O—O bond and enhances the stabilization of *OOH intermediates, thus improving the 2e- ORR performance. This work highlights the combination of non-metal active sites and geometry for 2e- ORR electrocatalysis.

Key words: Pyrrolic nitrogen, Electrocatalytic hydrogen peroxide production, Two-electron oxygen reduction reaction, Non-metal, *OOH intermediates