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Pavliuk, Mariia V; Gutiérrez Álvarez, Sol; Hattori, Yocefu; Messing, Maria E; Czapla-Masztafiak, Joanna; Szlachetko, Jakub; Silva, Jose L; Araujo, Carlos Moyses; A. Fernandes, Daniel L; Lu, Li; Kiely, Christopher J; Abdellah, Mohamed; Nordlander, Peter; Sá, Jacinto
The journal of physical chemistry letters, 04/2019, Letnik: 10, Številka: 8Journal Article
Hydrated electrons are important in radiation chemistry and charge-transfer reactions, with applications that include chemical damage of DNA, catalysis, and signaling. Conventionally, hydrated electrons are produced by pulsed radiolysis, sonolysis, two-ultraviolet-photon laser excitation of liquid water, or photodetachment of suitable electron donors. Here we report a method for the generation of hydrated electrons via single-visible-photon excitation of localized surface plasmon resonances (LSPRs) of supported sub-3 nm copper nanoparticles in contact with water. Only excitations at the LSPR maximum resulted in the formation of hydrated electrons, suggesting that plasmon excitation plays a crucial role in promoting electron transfer from the nanoparticle into the solution. The reactivity of the hydrated electrons was confirmed via proton reduction and concomitant H2 evolution in the presence of a Ru/TiO2 catalyst.
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