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摘要
The electrochemical oxygen reduction reaction (ORR) provides a green route for decentralized H2O2 synthesis, where a structure–selectivity relationship is pivotal for the control of a highly selective and active two‐electron pathway. Here, we report the fabrication of a boron and nitrogen co‐doped turbostratic carbon catalyst with tunable B?N?C configurations (CNB‐ZIL) by the assistance of a zwitterionic liquid (ZIL) for electrochemical hydrogen peroxide production. Combined spectroscopic analysis reveals a fine tailored B?N moiety in CNB‐ZIL, where interfacial B?N species in a homogeneous distribution tend to segregate into hexagonal boron nitride domains at higher pyrolysis temperatures. Based on the experimental observations, a correlation between the interfacial B?N moieties and HO2? selectivity is established. The CNB‐ZIL electrocatalysts with optimal interfacial B?N moieties exhibit a high HO2? selectivity with small overpotentials in alkaline media, giving a HO2? yield of ≈1787?mmol?gcatalyst?1?h?1 at ?1.4?V in a flow‐cell reactor.(#br)A boron and nitrogen co‐doped turbostratic carbon catalyst with tunable B?N?C configurations is fabricated by the assistance of a zwitterionic liquid, which is directly applied for HO2? synthesis in alkaline media through an O2 reduction reaction. Based on the combined spectroscopic analysis and electrochemical measurements, a correlation between the interfacial B?N moieties and HO2? selectivity is established.
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