Proceedings of nanoGe Fall Meeting19 (NFM19)
DOI: https://doi.org/10.29363/nanoge.nfm.2019.002
Publication date: 18th July 2019
Colloidal quantum dots (QDs) have many advantages of both heterogeneous and homogeneous photocatalysts for multi-electron reactions relevant to solar energy conversion and organic synthesis. This talk focuses on how the surface chemistry of metal chalcogenide QDs can be tuned to promote selectivity for certain reaction pathways, strong particle-molecule interactions, and the formation of colloidally stable assemblies for energy and charge funneling, for reactions such as proton and CO2 reduction, and carbon-carbon coupling. In particular, in situ photoinduced processes at the surfaces of CdS QDs control the products of the 2-electron oxidation of benzyl alcohol to either benzaldehyde or C-C coupled products in water; QD-QD and QD-porphyrin interactions can be tuned to promote the 2-electron reduction of CO2 to CO via an Fe porphyrin catalyst in DMSO and water; and stable colloidal assemblies of donor and acceptor CdSe QDs enable energy transfer-enhanced photocatalytic reduction of H+ to H2 in water.
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