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Efficient photocatalytic hydrogen peroxide generation coupled with selective benzylamine oxidation over defective ZrS3 nanobelts
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Efficient photocatalytic hydrogen peroxide generation coupled with selective benzylamine oxidation over defective ZrS3 nanobelts
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Journal Article
Efficient photocatalytic hydrogen peroxide generation coupled with selective benzylamine oxidation over defective ZrS3 nanobelts
2021
Overview
Photocatalytic hydrogen peroxide (H
2
O
2
) generation represents a promising approach for artificial photosynthesis. However, the sluggish half-reaction of water oxidation significantly limits the efficiency of H
2
O
2
generation. Here, a benzylamine oxidation with more favorable thermodynamics is employed as the half-reaction to couple with H
2
O
2
generation in water by using defective zirconium trisulfide (ZrS
3
) nanobelts as a photocatalyst. The ZrS
3
nanobelts with disulfide (S
2
2−
) and sulfide anion (S
2−
) vacancies exhibit an excellent photocatalytic performance for H
2
O
2
generation and simultaneous oxidation of benzylamine to benzonitrile with a high selectivity of >99%. More importantly, the S
2
2−
and S
2−
vacancies can be separately introduced into ZrS
3
nanobelts in a controlled manner. The S
2
2−
vacancies are further revealed to facilitate the separation of photogenerated charge carriers. The S
2−
vacancies can significantly improve the electron conduction, hole extraction, and kinetics of benzylamine oxidation. As a result, the use of defective ZrS
3
nanobelts yields a high production rate of 78.1 ± 1.5 and 32.0 ± 1.2 μmol h
−1
for H
2
O
2
and benzonitrile, respectively, under a simulated sunlight irradiation.
Photocatalytic H
2
O
2
generation represents a promising approach for artificial photosynthesis. Here, ZrS
3
nanobelts with controllable disulfide and sulfide anion vacancies exhibit an excellent photocatalytic H
2
O
2
generation performance together with selective oxidation of benzylamine to benzonitrile.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
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