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Issue 41, 2020
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g-C3N4-based photoelectrodes for photoelectrochemical water splitting: a review

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Abstract

Converting intermittent energies into green and storable chemical fuels (like hydrogen) is of great importance to address the global energy crisis and environmental issues. Photoelectrochemical (PEC) water splitting is a promising technology designed for this purpose, but its wide application relies significantly on the exploration of both economic and efficient electrode materials. g-C3N4 is a metal-free, low-cost and visible-light responsive semiconductor that shows great potential as a photoelectrode material for PEC water splitting. However, due to the inherent disadvantages of g-C3N4 and the difficulty in fabricating homogeneous and concrete g-C3N4 films, its PEC performance has encountered a bottleneck. For further attention on and breakthroughs in the development of g-C3N4-based photoelectrodes, this review commences with the basic principle of PEC water splitting. Then, recent progress in the strategies for improving the properties of g-C3N4 and the quality of g-C3N4 film electrodes is critically discussed, following the introduction of the basic structure of g-C3N4 as well as its advantages and challenges for PEC applications. Furthermore, current challenges in and future perspectives on obtaining g-C3N4-based electrodes for highly efficient and stable PEC water splitting are presented finally.

Graphical abstract: g-C3N4-based photoelectrodes for photoelectrochemical water splitting: a review

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Article information


Submitted
28 Jul 2020
Accepted
22 Sep 2020
First published
22 Sep 2020

J. Mater. Chem. A, 2020,8, 21474-21502
Article type
Review Article

g-C3N4-based photoelectrodes for photoelectrochemical water splitting: a review

X. Zou, Z. Sun and Y. H. Hu, J. Mater. Chem. A, 2020, 8, 21474
DOI: 10.1039/D0TA07345H

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