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Graphitic carbon nitride (g‐C<sub>3</sub>N<sub>4</sub>)‐based nanosized heteroarrays: Promising materials for photoelectrochemical water splitting

Liqun WangApplied Physics Department, College of Physics and Materials Science Tianjin Normal University Tianjin ChinaWenping SiKey Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin ChinaYueyu TongInstitute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials University of Wollongong North Wollongong NSW AustraliaFeng HouKey Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin ChinaDaniele PergolesiLaboratory for Multiscale Materials Experiments Paul Scherrer Institute Villigen PSI SwitzerlandJungang HouState Key Laboratory of Fine Chemicals, DUT‐KTH Joint Education and Research Center on Molecular Devices, Institute of Energy Science and Technology Dalian University of Technology (DUT) Dalian ChinaThomas LippertLaboratory for Multiscale Materials Experiments Paul Scherrer Institute Villigen PSI SwitzerlandShi Xue DouInstitute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials University of Wollongong North Wollongong NSW AustraliaJi LiangInstitute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials University of Wollongong North Wollongong NSW Australia

2020en

ABI

Annotatsiya

Abstract Photoelectrochemical (PEC) water splitting is recognized as a sustainable strategy for hydrogen generation due to its abundant hydrogen source, utilization of inexhaustible solar energy, high‐purity product, and environment‐friendly process. To actualize a practical PEC water splitting, it is paramount to develop efficient, stable, safe, and low‐cost photoelectrode materials. Recently, graphitic carbon nitride (g‐C 3 N 4 ) has aroused a great interest in the new generation photoelectrode materials because of its unique features, such as suitable band structure for water splitting, a certain range of visible light absorption, nontoxicity, and good stability. Some inherent defects of g‐C 3 N 4 , however, seriously impair further improvement on PEC performance, including low electronic conductivity, high recombination rate of photogenerated charges, and limited visible light absorption at long wavelength range. Construction of g‐C 3 N 4 ‐based nanosized heteroarrays as photoelectrodes has been regarded as a promising strategy to circumvent these inherent limitations and achieve the high‐performance PEC water splitting due to the accelerated exciton separation and the reduced combination of photogenerated electrons/holes. Herein, we summarize in detail the latest progress of g‐C 3 N 4 ‐based nanosized heteroarrays in PEC water‐splitting photoelectrodes. Firstly, the unique advantages of this type of photoelectrodes, including the highly ordered nanoarray architectures and the heterojunctions, are highlighted. Then, different g‐C 3 N 4 ‐based nanosized heteroarrays are comprehensively discussed, in terms of their fabrication methods, PEC capacities, and mechanisms, etc. To conclude, the key challenges and possible solutions for future development on g‐C 3 N 4 ‐based nanosized heteroarray photoelectrodes are discussed.

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Identifikatorlar

DOI: 10.1002/cey2.48

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