In:
Angewandte Chemie, Wiley, Vol. 134, No. 43 ( 2022-10-24)
Abstract:
Artificial photocatalysis offers a clean approach for producing H 2 O 2 . However, the poor selectivity and activity of H 2 O 2 production hamper traditional industrial applications and emerging photodynamic therapy (PDT)/chemodynamic therapy (CDT). Herein, we report a C 5 N 2 photocatalyst with a conjugated C=N linkage for selective and efficient non‐sacrificial H 2 O 2 production in both normoxic and hypoxic systems. The strengthened delocalization of π‐electrons by linkers in C 5 N 2 downshifted the band position, thermodynamically eliminating side H 2 evolution reaction and kinetically promoting water oxidation. As a result, C 5 N 2 had a competitive solar‐to‐chemical conversion efficiency of 0.55 % in overall H 2 O 2 production and exhibited by far the highest activity under hypoxic conditions (698 μM h −1 ). C 5 N 2 was further applied to hypoxic PDT/CDT with outstanding performance in apparent cancer cell death and synchronous bioimaging. The study sheds light on the photosynthesis of H 2 O 2 by carbon nitrides for health applications.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.43
DOI:
10.1002/ange.202210856
Language:
English
Publisher:
Wiley
Publication Date:
2022
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