In:
Angewandte Chemie, Wiley, Vol. 134, No. 37 ( 2022-09-12)
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.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.37
DOI:
10.1002/ange.202206915
Language:
English
Publisher:
Wiley
Publication Date:
2022
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