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  Carbon nanodots for all-in-one photocatalytic hydrogen generation

Jana, B., Reva, Y., Scharl, T., Strauß, V., Cadranel, A., & Guldi, D. M. (2021). Carbon nanodots for all-in-one photocatalytic hydrogen generation. Journal of the American Chemical Society, 143(48), 20122-20132. doi:10.1021/jacs.1c07049.

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 Creators:
Jana, Bikash, Author
Reva, Yana, Author
Scharl, Tobias, Author
Strauß, Volker1, Author              
Cadranel, Alejandro, Author
Guldi, Dirk M., Author
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1Volker Strauß, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3025555              

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 Abstract: Carbon nanodots (CNDs) were photochemically altered to produce dihydrogen under light irradiation. Within the complex structure of CNDs, photo-oxidation takes place at citrazinic acid molecular fluorophore sites. Important is the fact that the resulting CND materials have a dual function. On one hand, they absorb light, and on the other hand, they photo- and electrocatalytically produce dihydrogen from water and seawater, without any external photosensitizer or cocatalyst. Record HER activities of 15.15 and 19.70 mmol(H2) g(catalyst)−1 h–1 were obtained after 1 h of 75 mW/cm2 Xe lamp illumination, from water and seawater, respectively. This impressive performance outweighs the remaining structural uncertainties. A full-fledged physicochemical investigation based on an arsenal of steady-state and time-resolved spectroscopic characterizations together with microscopy enabled a comprehensive look into the reaction mechanism. For an efficient dihydrogen formation, a precatalytic activation by means of reduction with a sacrificial electron donor is imperative.

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Language(s): eng - English
 Dates: 2021-11-292021
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1021/jacs.1c07049
BibTex Citekey: doi:10.1021/jacs.1c07049
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Title: Journal of the American Chemical Society
  Other : JACS
  Abbreviation : J. Am. Chem. Soc.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 143 (48) Sequence Number: - Start / End Page: 20122 - 20132 Identifier: ISSN: 0002-7863