Reversible and cooperative photoactivation of single-atom Cu/TiO2 photocatalysts

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The reversible and cooperative activation process, which includes electron transfer from surrounding redox mediators, the reversible valence change of cofactors and macroscopic functional/structural change, is one of the most important characteristics of biological enzymes, and has frequently been used in the design of homogeneous catalysts. However, there are virtually no reports on industrially important heterogeneous catalysts with these enzyme-like characteristics. Here, we report on the design and synthesis of highly active TiO2 photocatalysts incorporating site-specific single copper atoms (Cu/TiO2) that exhibit a reversible and cooperative photoactivation process. Our atomic-level design and synthetic strategy provide a platform that facilitates valence control of co-catalyst copper atoms, reversible modulation of the macroscopic optoelectronic properties of TiO2 and enhancement of photocatalytic hydrogen generation activity, extending the boundaries of conventional heterogeneous catalysts.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2019-06
Language
English
Article Type
Article
Citation

NATURE MATERIALS, v.18, no.6, pp.620 - +

ISSN
1476-1122
DOI
10.1038/s41563-019-0344-1
URI
http://hdl.handle.net/10203/262634
Appears in Collection
EEW-Journal Papers(저널논문)
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