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  H2 and CH4 production from bio-alcohols using condensed poly(heptazine imide) with visible light

Zheng, D., Zhou, J., Fang, Z., Heil, T., Savateev, A., Zhang, Y., et al. (2021). H2 and CH4 production from bio-alcohols using condensed poly(heptazine imide) with visible light. Journal of Materials Chemistry A, 9(48), 27370-27379. doi:10.1039/D1TA08578F.

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 Creators:
Zheng, Dandan, Author
Zhou, Jingmin, Author
Fang, Zhongpu, Author
Heil, Tobias1, Author              
Savateev, Aleksandr2, Author              
Zhang, Yongfan, Author
Antonietti, Markus3, Author              
Zhang, Guigang2, Author              
Wang, Xinchen, Author
Affiliations:
1Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2522693              
2Aleksandr Savateev, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2421702              
3Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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 Abstract: Photocatalytic H2 production via water splitting holds great potential for the conversion of solar energy into renewable and storable chemical fuels in a sustainable manner, but this up-hill reaction is mainly hindered by the water oxidation process. This reaction is sluggish and relies on high overpotentials (wasted energy), while only oxygen is generated as a low value oxidation by-product. Coupling hydrogen generation to a less unfavorable oxidation reaction creating higher value products is therefore a recommendable issue. Here we found that poly(heptazine imide) (PHI), a stable and reactive allotrope of crystalline carbon nitride, supported with highly dispersed Pt nanoparticles (PtNPs) could achieve efficient and persistent H2 and CH4 production by photocatalytic reforming of biomass derived alcohols under visible light irradiation. The results reveal that PHI with low grain boundary defects restrains the bulk charge carrier recombination and largely promotes photocatalytic efficiency. The apparent quantum efficiency (AQE) of the optimized material for visible light H2 evolution could reach values as high as 15 at 420 nm. The DFT results reveal that the activity is associated with the Tafel step rather than the Volmer–Tafel step. This study highlights the development of a new covalent scaffold for the simultaneous generation of storable and valuable chemical fuels (H2 and CH4) in a feasible photocatalytic manner.

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Language(s): eng - English
 Dates: 2021-11-012021
 Publication Status: Published in print
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 Identifiers: DOI: 10.1039/D1TA08578F
BibTex Citekey: D1TA08578F
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Title: Journal of Materials Chemistry A
  Abbreviation : J. Mater. Chem. A
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 9 (48) Sequence Number: - Start / End Page: 27370 - 27379 Identifier: ISSN: 2050-7488