Boosting the electrochemical O2-to-H2O2 synthesis by revamping the FeMo catalyst with N/O co-doped surface

Abstract

In electrochemical O2-to-H2O2 synthesis, the lack of systematic strategies and proof-of-concept studies is one of the key problems for practical applications. Herein, as exemplified by the FeMo bimetallic material for a two-electron oxygen reduction reaction (2e- ORR), we report a substantial improvement by facilitating the surface reconstruction of oxides or nitrides into N/O co-doped electrocatalyst. Additionally, in-depth evidence including electrochemical signals, H2O2-proof work, in-situ Raman and density functional theory (DFT) calculations, identified that the N/O co-doped FeMo catalyst has been favored by 2e- ORR, opening an effective pathway to the design of more bimetallic catalysts for electroreduction of O2 to H2O2.