Identification of Prime Factors to Maximize the Photocatalytic Hydrogen Evolution of Covalent Organic Frameworks

Samrat Ghosh, Akinobu Nakada, Maximilian A. Springer, Takahiro Kawaguchi, Katsuaki Suzuki, Hironori Kaji, Igor Baburin, Agnieszka Kuc, Thomas Heine, Hajime Suzuki, Ryu Abe, Shu Seki

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3 Citations (Scopus)

Abstract

Visible-light-driven hydrogen (H2) production from water is a promising strategy to convert and store solar energy as chemical energy. Covalent organic frameworks (COFs) are front runners among different classes of organic photocatalysts. The photocatalytic activity of COFs depends on numerous factors such as the electronic band gap, crystallinity, surface area, exciton migration, stability of transient species, charge separation and transport, etc. However, it is challenging to fine tune all of these factors simultaneously to enhance the photocatalytic activity. Hence, in this report, an effort has been made to understand the interplay of these factors and identify the key factors for efficient photocatalytic H2 production through a structure-property-activity relationship. Careful molecular engineering allowed us to optimize all of the above plausible factors impacting the overall catalytic activities of a series of isoreticular COFs. The present study determines three prime factors: light absorption, charge carrier generation, and its transport, which influence the photocatalytic H2 production of COFs to a much greater extent than the other factors.

Original languageEnglish
Pages (from-to)9752-9762
Number of pages11
JournalJournal of the American Chemical Society
Volume142
Issue number21
DOIs
Publication statusPublished - 2020 May 27

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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    Ghosh, S., Nakada, A., Springer, M. A., Kawaguchi, T., Suzuki, K., Kaji, H., Baburin, I., Kuc, A., Heine, T., Suzuki, H., Abe, R., & Seki, S. (2020). Identification of Prime Factors to Maximize the Photocatalytic Hydrogen Evolution of Covalent Organic Frameworks. Journal of the American Chemical Society, 142(21), 9752-9762. https://doi.org/10.1021/jacs.0c02633