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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202101751
|2 doi
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|a pubmed24n1083.xml
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|a (DE-627)NLM325154538
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|a (NLM)33963776
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|a DE-627
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|a eng
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|a Hu, Cheng
|e verfasserin
|4 aut
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|a Exceptional Cocatalyst-Free Photo-Enhanced Piezocatalytic Hydrogen Evolution of Carbon Nitride Nanosheets from Strong In-Plane Polarization
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 21.06.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 Wiley-VCH GmbH.
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|a Utilizing mechanical energy to produce hydrogen is emerging as a promising way to generate renewable energy, but is challenged by low efficiency and scanty cognition. In this work, graphitic carbon nitride (g-C3 N4 ) with an atomically thin sheet-like structure is applied for prominent piezocatalytic and photo-enhanced piezocatalytic H2 production. It is revealed that the anomalous piezoelectricity in g-C3 N4 originates from the strong in-plane polarization along the a-axis, contributed by the superimposed polar tri-s-triazine units and flexoelectric effect derived from the structured triangular cavities, which provides powerful electrochemical driving force for the water reduction reaction. Furthermore, the photo-enhanced charge transfer enables g-C3 N4 nanosheets to reserve more energized polarization charges to fully participate in the reaction at the surface reactive sites enriched by strain-induced carbon vacancies. Without any cocatalysts, an exceptional photo-piezocatalytic H2 evolution rate of 12.16 mmol g-1 h-1 is delivered by the g-C3 N4 nanosheets, far exceeding that of previously reported piezocatalysts and g-C3 N4 photocatalysts. Further, high pure-water-splitting performance with production of the value-added oxidation product H2 O2 via photo-piezocatalysis is also disclosed. This work not only exposes the potential of g-C3 N4 as a piezo-semiconductor for catalytic H2 evolution, but also breaks a new ground for the conversion of solar and mechanical energy by photomediated piezocatalytic reaction
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|a Journal Article
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|a charge transport
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|a hydrogen evolution
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|a photo-piezocatalysis
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|a reactive sites
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1 |
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|a Chen, Fang
|e verfasserin
|4 aut
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| 700 |
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|a Wang, Yonggang
|e verfasserin
|4 aut
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| 700 |
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|a Tian, Na
|e verfasserin
|4 aut
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|a Ma, Tianyi
|e verfasserin
|4 aut
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|a Zhang, Yihe
|e verfasserin
|4 aut
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|a Huang, Hongwei
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 33(2021), 24 vom: 01. Juni, Seite e2101751
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:33
|g year:2021
|g number:24
|g day:01
|g month:06
|g pages:e2101751
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|u http://dx.doi.org/10.1002/adma.202101751
|3 Volltext
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