Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 32, Pages 9402-9406Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201604355
Keywords
carbon quantum dots; hydrogen evolution; molecular catalysis; photocatalysis; photosensitizers
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Funding
- Oppenheimer Ph.D. scholarship
- Christian Doppler Research Association (Austrian Federal Ministry of Science, Research and Economy)
- Christian Doppler Research Association (National Foundation for Research, Technology and Development)
- OMV Group
- Swiss National Science Foundation [CRSII2-136205/1]
- University Research Priority Program (URPP) LightChEC
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Carbon quantum dots (CQDs) are new-generation light absorbers for photocatalytic H-2 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 mol(H2)(mol(Ni))(-1) for a defined synthetic molecular nickel catalyst in purely aqueous solution under AM1.5G solar irradiation.
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