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Cited by 469

The DOI matches its Crossref record; 43 of the 43 references it cites were found in a registry or an index.

Visible-Light-Driven Nitrogen Fixation Catalyzed by Bi5O7Br Nanostructures: Enhanced Performance by Oxygen Vacancies

Li, Peishen, Zhou, Ziang, Wang, Qiang, Guo, Ming, Chen, Shaowei, Low, Jingxiang, Long, Ran, Liu, Wen, Ding, Peiren, Wu, Yunyun, Xiong, Yujie·2020·Journal of the American Chemical Society

Abstract

Photocatalytic nitrogen fixation represents a green alternative to the conventional Haber–Bosch process in the conversion of nitrogen to ammonia. In this study, a series of Bi 5 O 7 Br nanostructures were synthesized via a facile, low-temperature thermal treatment procedure, and their photocatalytic activity toward nitrogen fixation was evaluated and compared. Spectroscopic measurements showed that the tubular Bi 5 O 7 Br sample prepared at 40 °C (Bi 5 O 7 Br-40) exhibited the highest electron-transfer rate among the series, producing a large number of O 2 .– radicals and oxygen vacancies under visible-light photoirradiation and reaching a rate of photocatalytic nitrogen fixation of 12.72 mM·g –1 ·h –1 after 30 min of photoirradiation. The reaction dynamics was also monitored by in situ infrared measurements with a synchrotron radiation light source, where the transient difference between signals in the dark and under photoirradiation was analyzed and the reaction pathway of nitrogen fixation was identified. This was further supported by results from density functional theory calculations. The reaction energy of nitrogen fixation was quantitatively estimated and compared by building oxygen-enriched and anoxic models, where the change in the oxygen vacancy concentration was found to play a critical role in determining the nitrogen fixation performance. Results from this study suggest that Bi 5 O 7 Br with rich oxygen vacancies can be used as a high-performance photocatalyst for nitrogen fixation.

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Metadata

Authors
Li, P., Zhou, Z., Wang, Q., Guo, M., Chen, S., Low, J., Long, R., Liu, W., Ding, P., Wu, Y., & Xiong, Y.
Venue
Journal of the American Chemical Society
Published
2020-06-12
Volume
142
Issue
28
Pages
12430-12439
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W3034585612
Cited by
469
References
43
FWCI
11.47
Type
journal article
Language
en
Open access
closed

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