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Cited by 641

The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.

Highly Efficient and Exceptionally Durable CO2 Photoreduction to Methanol over Freestanding Defective Single-Unit-Cell Bismuth Vanadate Layers

Gao, Shan, Gu, Bingchuan, Jiao, Xingchen, Sun, Yongfu, Zu, Xiaolong, Yang, Fan, Zhu, Wenguang, Wang, Chengming, Feng, Zimou, Ye, Bangjiao, Xie, Yi·2017·Journal of the American Chemical Society

Abstract

Unearthing an ideal model for disclosing the role of defect sites in solar CO 2 reduction remains a great challenge. Here, freestanding gram-scale single-unit-cell o -BiVO 4 layers are successfully synthesized for the first time. Positron annihilation spectrometry and X-ray fluorescence unveil their distinct vanadium vacancy concentrations. Density functional calculations reveal that the introduction of vanadium vacancies brings a new defect level and higher hole concentration near Fermi level, resulting in increased photoabsorption and superior electronic conductivity. The higher surface photovoltage intensity of single-unit-cell o -BiVO 4 layers with rich vanadium vacancies ensures their higher carriers separation efficiency, further confirmed by the increased carriers lifetime from 74.5 to 143.6 ns revealed by time-resolved fluorescence emission decay spectra. As a result, single-unit-cell o -BiVO 4 layers with rich vanadium vacancies exhibit a high methanol formation rate up to 398.3 μmol g –1 h –1 and an apparent quantum efficiency of 5.96% at 350 nm, much larger than that of single-unit-cell o -BiVO 4 layers with poor vanadium vacancies, and also the former’s catalytic activity proceeds without deactivation even after 96 h. This highly efficient and spectrally stable CO 2 photoconversion performances hold great promise for practical implementation of solar fuel production.

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Crossref · 10.1021/jacs.6b11263

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Metadata

Authors
Gao, S., Gu, B., Jiao, X., Sun, Y., Zu, X., Yang, F., Zhu, W., Wang, C., Feng, Z., Ye, B., & Xie, Y.
Venue
Journal of the American Chemical Society
Published
2017-02-24
Volume
139
Issue
9
Pages
3438-3445
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2588805918
Cited by
641
References
30
FWCI
16.37
Type
journal article
Language
en
Open access
closed

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