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Constructing Interfacial Boron‐Nitrogen Moieties in Turbostratic Carbon for Electrochemical Hydrogen Peroxide Production

2022; Wiley; Volume: 61; Issue: 37 Linguagem: Inglês

10.1002/anie.202206915

1521-3773

Zhihong Tian, Qingran Zhang, Lars Thomsen, Nana Gao, Jian Pan, Rahman Daiyan, Jimmy Yun, Jessica Brandt, Nieves López‐Salas, Feili Lai, Qiuye Li, Tianxi Liu, Rose Amal, Xunyu Lu, Markus Antonietti,

Supercapacitor Materials and Fabrication

Abstract The electrochemical oxygen reduction reaction (ORR) provides a green route for decentralized H 2 O 2 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 HO 2 − selectivity is established. The CNB‐ZIL electrocatalysts with optimal interfacial B−N moieties exhibit a high HO 2 − selectivity with small overpotentials in alkaline media, giving a HO 2 − yield of ≈1787 mmol g catalyst −1 h −1 at −1.4 V in a flow‐cell reactor.