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Low-molecular-weight carbon nitrides for solar hydrogen evolution.

Publication ,  Journal Article
Lau, VW-H; Mesch, MB; Duppel, V; Blum, V; Senker, J; Lotsch, BV
Published in: Journal of the American Chemical Society
January 2015

This work focuses on the control of the polymerization process for melon ("graphitic carbon nitride"), with the aim of improving its photocatalytic activity intrinsically. We demonstrate here that reduction of the synthesis temperature leads to a mixture of the monomer melem and its higher condensates. We show that this mixture can be separated and provide evidence that the higher condensates are isolated oligomers of melem. On evaluating their photocatalytic activity for hydrogen evolution, the oligomers were found to be the most active species, having up to twice the activity of the monomer/oligomer mixture of the as-synthesized material, which in turn has 3 times the activity of the polymer melon, the literature benchmark. These results highlight the role of "defects", i.e., chain terminations, in increasing the catalytic activity of carbon nitrides and at the same time point to the ample potential of intrinsically improving the photocatalytic activity of "carbon nitride", especially through the selective synthesis of the active phase.

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Published In

Journal of the American Chemical Society

DOI

EISSN

1520-5126

ISSN

0002-7863

Publication Date

January 2015

Volume

137

Issue

3

Start / End Page

1064 / 1072

Related Subject Headings

  • General Chemistry
  • 40 Engineering
  • 34 Chemical sciences
  • 03 Chemical Sciences
 

Citation

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Lau, V.-H., Mesch, M. B., Duppel, V., Blum, V., Senker, J., & Lotsch, B. V. (2015). Low-molecular-weight carbon nitrides for solar hydrogen evolution. Journal of the American Chemical Society, 137(3), 1064–1072. https://doi.org/10.1021/ja511802c
Lau, Vincent Wing-hei, Maria B. Mesch, Viola Duppel, Volker Blum, Jürgen Senker, and Bettina V. Lotsch. “Low-molecular-weight carbon nitrides for solar hydrogen evolution.Journal of the American Chemical Society 137, no. 3 (January 2015): 1064–72. https://doi.org/10.1021/ja511802c.
Lau VW-H, Mesch MB, Duppel V, Blum V, Senker J, Lotsch BV. Low-molecular-weight carbon nitrides for solar hydrogen evolution. Journal of the American Chemical Society. 2015 Jan;137(3):1064–72.
Lau, Vincent Wing-hei, et al. “Low-molecular-weight carbon nitrides for solar hydrogen evolution.Journal of the American Chemical Society, vol. 137, no. 3, Jan. 2015, pp. 1064–72. Epmc, doi:10.1021/ja511802c.
Lau VW-H, Mesch MB, Duppel V, Blum V, Senker J, Lotsch BV. Low-molecular-weight carbon nitrides for solar hydrogen evolution. Journal of the American Chemical Society. 2015 Jan;137(3):1064–1072.
Journal cover image

Published In

Journal of the American Chemical Society

DOI

EISSN

1520-5126

ISSN

0002-7863

Publication Date

January 2015

Volume

137

Issue

3

Start / End Page

1064 / 1072

Related Subject Headings

  • General Chemistry
  • 40 Engineering
  • 34 Chemical sciences
  • 03 Chemical Sciences