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Covalent Grafting of Ruthenium Complexes on Iron Oxide Nanoparticles: Hybrid Materials for Photocatalytic Water Oxidation

Nguyen Thi, Quyen and Rousset, Elodie and Nguyen, Van T. H. and Collière, Vincent and Lecante, Pierre and Klysubun, Wantana and Philippot, Karine and Esvan, Jérôme and Respaud, Marc and Lemercier, Gilles and Tran, Phong D. and Amiens, Catherine Covalent Grafting of Ruthenium Complexes on Iron Oxide Nanoparticles: Hybrid Materials for Photocatalytic Water Oxidation. (2021) ACS Applied Materials and Interfaces, 13 (45). 53829-53840. ISSN 1944-8244

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Official URL: https://doi.org/10.1021/acsami.1c15051

Abstract

The present environmental crisis prompts the search for renewable energy sources such as solar-driven production of hydrogen from water. Herein, we report an efficient hybrid photocatalyst for water oxidation, consisting of a ruthenium polypyridyl complex covalently grafted on core/shell Fe@FeOx nanoparticles via a phosphonic acid group. The photoelectrochemical measurements were performed under 1 sun illumination in 1 M KOH. The photocurrent density of this hybrid photoanode reached 20 μA/cm2 (applied potential of +1.0 V vs reversible hydrogen electrode), corresponding to a turnover frequency of 0.02 s–1. This performance represents a 9-fold enhancement of that achieved with a mixture of Fe@FeOx nanoparticles and a linker-free ruthenium polypyridyl photosensitizer. This increase in performance could be attributed to a more efficient electron transfer between the ruthenium photosensitizer and the Fe@FeOx catalyst as a consequence of the covalent link between these two species through the phosphonate pendant group.

Item Type:Article
HAL Id:hal-03436779
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Other partners > Synchrotron Light Research Institute (THAILAND)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université des Sciences et des Technologies de Hanoi - USTH (VIETNAM)
Other partners > Université de Reims - Champagne-Ardenne (FRANCE)
Laboratory name:
Funders:
Vietnam Academy of Science and Technology
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Deposited On:19 Nov 2021 13:57

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