Stable acidic H2O2 electrosynthesis via in situ Ti–N bridging sites

Abstract

Acidic hydrogen peroxide electrosynthesis suffers from catalyst instability issues. We develop the MIL-125@Ppy catalyst, achieving a high H₂O₂ electrosynthesis yield rate of 69.5 mol g_cat⁻¹ h⁻¹ (faradaic efficiency of 82.2%) at pH = 1 for operation more than 50 h. Spectroscopic evidence confirms that in situ-formed Ti–N bridge sites mediate the stabilization of *OOH, enabling the selective and stable two-electron pathway.