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Immobilization of molecular catalysts on electrode surfaces using host–guest interactions


Sévery, Laurent; Szczerbiński, Jacek; Taskin, Mert; Tuncay, Isik; Brandalise Nunes, Fernanda; Cignarella, Chiara; Tocci, Gabriele; Blacque, Olivier; Osterwalder, Jürg; Zenobi, Renato; Iannuzzi, Marcella; Tilley, S David (2021). Immobilization of molecular catalysts on electrode surfaces using host–guest interactions. Nature Chemistry, 13(6):523-529.

Abstract

Anchoring molecular catalysts on electrode surfaces combines the high selectivity and activity of molecular systems with the practicality of heterogeneous systems. Molecular catalysts, however, are far less stable than traditional heterogeneous electrocatalysts, and therefore a method to easily replace anchored molecular catalysts that have degraded could make such electrosynthetic systems more attractive. Here we applied a non-covalent ‘click’ chemistry approach to reversibly bind molecular electrocatalysts to electrode surfaces through host–guest complexation with surface-anchored cyclodextrins. The host–guest interaction is remarkably strong and enables the flow of electrons between the electrode and the guest catalyst. Electrosynthesis in both organic and aqueous media was demonstrated on metal oxide electrodes, with stability on the order of hours. The catalytic surfaces can be recycled by controlled release of the guest from the host cavities and the readsorption of fresh guest.

Abstract

Anchoring molecular catalysts on electrode surfaces combines the high selectivity and activity of molecular systems with the practicality of heterogeneous systems. Molecular catalysts, however, are far less stable than traditional heterogeneous electrocatalysts, and therefore a method to easily replace anchored molecular catalysts that have degraded could make such electrosynthetic systems more attractive. Here we applied a non-covalent ‘click’ chemistry approach to reversibly bind molecular electrocatalysts to electrode surfaces through host–guest complexation with surface-anchored cyclodextrins. The host–guest interaction is remarkably strong and enables the flow of electrons between the electrode and the guest catalyst. Electrosynthesis in both organic and aqueous media was demonstrated on metal oxide electrodes, with stability on the order of hours. The catalytic surfaces can be recycled by controlled release of the guest from the host cavities and the readsorption of fresh guest.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
07 Faculty of Science > Physics Institute
08 Research Priority Programs > Solar Light to Chemical Energy Conversion
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > General Chemistry
Physical Sciences > General Chemical Engineering
Uncontrolled Keywords:General Chemistry, General Chemical Engineering
Language:English
Date:1 June 2021
Deposited On:23 Jun 2021 15:40
Last Modified:25 Sep 2021 00:00
Publisher:Nature Publishing Group
ISSN:1755-4330
OA Status:Green
Publisher DOI:https://doi.org/10.1038/s41557-021-00652-y
Project Information:
  • : FunderSNSF
  • : Grant IDPYAPP2_160586
  • : Project TitleSolar Water Splitting: Photovoltage, Surface Dipole, and Catalysis Strategies

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