Issue 9, 2018

FeCoW multimetal oxide-coated W:BiVO4 photoanode for efficient oxygen evolution

Abstract

BiVO4 is one of the most promising photoanode materials due to its relatively small band gap (∼2.4 eV) for efficient light absorption, and its suitable valence band edge for the oxygen evolution reaction. However, it achieves a photocurrent which is much lower than the theoretical value of 7.5 mA cm−2. Herein we prepare a multimetal oxide-based heterojunction W:BiVO4–FeCoW by a sol–gel approach with post-annealing. The heterojunction photoanode exhibits a photocurrent which is enhanced to ∼3.8 times that of a W:BiVO4 photoanode at 1.23 V vs. the reversible hydrogen electrode (RHE), and a significant negative shift of the flat-band potential of 280 mV. The experimental results demonstrate that the performance enhancement mechanism can be attributed to the significantly enhanced charge separation/transport and light absorption due to the multimetal oxide-modified heterojunction.

Graphical abstract: FeCoW multimetal oxide-coated W:BiVO4 photoanode for efficient oxygen evolution

Article information

Article type
Paper
Submitted
23 апр 2018
Accepted
13 юни 2018
First published
13 юни 2018

Sustainable Energy Fuels, 2018,2, 2053-2059

FeCoW multimetal oxide-coated W:BiVO4 photoanode for efficient oxygen evolution

X. Liang, J. Xie, J. Xiong, L. Gong and C. M. Li, Sustainable Energy Fuels, 2018, 2, 2053 DOI: 10.1039/C8SE00190A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements