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  Improving artificial photosynthesis in carbon nitride by gas-liquid-solid Interface management for full light-induced CO2 reduction to C1-C2 fuels and O2

Xia, Y., Xiao, K., Cheng, B., Yu, J., Jiang, L., Antonietti, M., et al. (2020). Improving artificial photosynthesis in carbon nitride by gas-liquid-solid Interface management for full light-induced CO2 reduction to C1-C2 fuels and O2. ChemSusChem, 13(7), 1730-1734. doi:10.1002/cssc.201903515.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-9B97-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-195C-7
Genre: Journal Article

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 Creators:
Xia, Yang, Author
Xiao, Kai1, Author              
Cheng, Bei, Author
Yu, Jiaguo, Author
Jiang, Lei, Author
Antonietti, Markus2, Author              
Cao, Shaowen2, Author              
Affiliations:
1Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863288              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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Free keywords: photocatalysis, hydrophobic substrate, Polymeric carbon nitride, triphase interfaces, overall CO2 reduction
 Abstract: The activity and selectivity of simple photocatalysts for CO2 reduction were still limited by the insufficient photophysics of the catalysts, but also the low solubility and slow mass transport of gas molecules in/through aqueous solution. Herein, we present a way to overcome these limitation by constructing a triphase photocatalytic system, in which polymeric carbon nitride (CN) is immobilized onto a hydrophobic substrate, and the photocatalytic reduction reaction occurs at a gas-liquid-solid (CO2-water-catalyst) triple connection. It is found that the CN anchored onto the surface of a hydrophobic substrate exhibits an about 7.2-fold enhancement in the total CO2 conversion, with a rate of 415.50 ?mol m-2 h-1 under simulated solar light irradiation. This value corresponds to an overall photosynthetic efficiency for full water-CO2 conversion of 0.33%, i.e. very close to biological systems. Meanwhile, a remarkable enhancement of direct C2 hydrocarbon production, as well as a high CO2 conversion selectivity of 97.7% was observed. Going from water oxidation to phosphate oxidation, the quantum yield can be even increased to 1.28%.

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Language(s): eng - English
 Dates: 2020-01-152020
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/cssc.201903515
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Title: ChemSusChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 13 (7) Sequence Number: - Start / End Page: 1730 - 1734 Identifier: ISSN: 1864-5631