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Journal Article

Constructing interfacial boron-nitrogen moieties in turbostratic carbon for electrochemical hydrogen peroxide production

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Brandt,  Jessica
Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Lopez Salas,  Nieves       
Nieves Lopez Salas, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Antonietti,  Markus
Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Tian, Z., Zhang, Q., Thomsen, L., Gao, N., Pan, J., Daiyan, R., et al. (2022). Constructing interfacial boron-nitrogen moieties in turbostratic carbon for electrochemical hydrogen peroxide production. Angewandte Chemie International Edition, 61(37): e202206915. doi:10.1002/anie.202206915.


Cite as: https://hdl.handle.net/21.11116/0000-000A-CD0F-0
Abstract
Electrochemical oxygen reduction reaction (ORR) provides a green route for decentralized H2O2 synthesis, where astructure-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.