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Efficient hydrogen (H2) production through photocatalytic water splitting was achieved by using an amino-functionalized azolate/cobalt-based metal–organic framework (MOF). While previous reports highlighted the amino group’s role only as a substituent group for enabling light absorption of MOFs in the visible region, our present study revealed its dual role. The amino substituent not only acts as an electron donor to increase the electron availability at the active Co sites but also provides hydrogen-hopping sites within the pore channel, facilitating proton (H+) diffusion along the framework. This dual functionality significantly boosts the performance of this Co-MOF as a hydrogen evolution cocatalyst. When combined with fluorescein and triethylamine as the photosensitizer and sacrificial agent, respectively, the Co-MOF achieved a remarkable H2 production rate of 27 mmol g–1 over 4 h. Notably, this performance surpasses those of benchmark platinum (Pt) and titanium dioxide (TiO2) cocatalysts.

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• In Copyright
  

  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Tuning Electronic and Proton Transfer Properties on Amino-Functionalized Co-Based MOF for Efficient Photocatalytic Hydrogen Evolution, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.4c10061

Keyword: metal–organic frameworks , photocatalysis, water splitting, HER, hydrogen production

Date published: 2024-11-27

Publisher: American Chemical Society (ACS)

Journal:

• ACS Applied Materials & Interfaces (ISSN: 19448252) vol. 16 issue. 47 p. 64638-64645

Funding:

• Vidyasirimedhi Institute of Science and Technology
• Program Management Unit for Human Resources and Institutional Development, Research and Innovation B05F650042

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5176

First published URL: https://doi.org/10.1021/acsami.4c10061

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Updated at: 2025-09-18 08:30:29 +0900

Published on MDR: 2025-09-18 08:19:37 +0900