Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 37, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202206915
Keywords
B; N Co-Doping; H2O2 Synthesis; Oxygen Reduction Reaction; Turbostratic Carbon
Categories
Funding
- National Natural Science Foundation of China [52003251]
- Henan Center for Outstanding Overseas Scientists [GZS2022014]
- Australian Renewable Energy Agency [ARENA 2018/RND014]
- Australian Research Council (ARC) Training Centre for Global Hydrogen Economy [IC200100023]
- ARC Research Hub on Integrated Energy Storage Solutions [IH180100020]
- UNSW Scientia Scheme
- ARC [DE190100131]
- Max Planck Society
- Australian Research Council [DE190100131] Funding Source: Australian Research Council
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A boron and nitrogen co-doped turbostratic carbon catalyst (CNB-ZIL) with tunable B-N-C configurations was successfully synthesized using a zwitterionic liquid as an assistant for electrochemical hydrogen peroxide production. The fine-tailored B-N moiety in CNB-ZIL allows for selective and active HO2- generation, achieving a small overpotential in alkaline media.
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 approximate to 1787 mmol g(catalyst)(-1) h(-1) at -1.4 V in a flow-cell reactor.
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