H.N. Du ‡, H.T. Li ‡, H.J. Jing ‡, T.Y. Liu, Z.C. Xu, C.Y. Li, Y.Y. Xu, Z.J. Tan, X.L. Tang, C. Tang *, J. Liu * and Z.-S. Wu *

Angewandte Chemie International Edition, 2025, accepted.

The two-electron oxygen reduction reaction (2e– ORR) enables sustainable electrochemical production of hydrogen peroxide (H2O2), providing a green alternative to the traditional anthraquinone process. Herein, we report N/O dual-doped hierarchically porous carbon nanoreactors (N/O-HPCNs) derived from ZIF-8 via a facile one-step pyrolysis. The optimized catalyst achieves ~90% H2O2 selectivity over a wide potential range in 0.10 M KOH. Crucially, in a flow cell, N/O-HPCNs deliver an industrial-grade current density of 200 mA cm-2 with 92.8% Faradaic efficiency and a remarkable H2O2 yield of 17.3 mol g-1 h-1, while maintaining >80% Faraday efficiency for 100 h. Finite element simulations and electrochemical results confirm that hierarchical pores enhance mass transfer and reduce H2O2 residence time, while oxygen functional groups promote 2e– ORR selectivity. This work provides a scalable strategy for sustainable H2O2 production.