Clean Donor Oxidation Enhances the H2 Evolution Activity of a Carbon Quantum Dot-Molecular Catalyst Photosystem.
Accepted version
Peer-reviewed
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Repository DOI
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Authors
Martindale, Benjamin CM
Joliat, Evelyne
Bachmann, Cyril
Alberto, Roger
Reisner, Erwin https://orcid.org/0000-0002-7781-1616
Abstract
Carbon quantum dots (CQDs) are new-generation light absorbers for photocatalytic H2 evolution in aqueous solution, but the performance of CQD-molecular catalyst systems is currently limited by the decomposition of the molecular component. Clean oxidation of the electron donor by donor recycling prevents the formation of destructive radical species and non-innocent oxidation products. This approach allowed a CQD-molecular nickel bis(diphosphine) photocatalyst system to reach a benchmark lifetime of more than 5 days and a record turnover number of 1094±61 molH2 (molNi )(-1) for a defined synthetic molecular nickel catalyst in purely aqueous solution under AM1.5G solar irradiation.
Description
Keywords
carbon quantum dots, hydrogen evolution, molecular catalysis, photocatalysis, photosensitizers
Journal Title
Angew Chem Int Ed Engl
Conference Name
Journal ISSN
1433-7851
1521-3773
1521-3773
Volume Title
Publisher
Wiley