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- Title
Iced photochemical reduction to synthesize atomically dispersed metals by suppressing nanocrystal growth.
- Authors
Hehe Wei; Kai Huang; Da Wang; Ruoyu Zhang; Binghui Ge; Jingyuan Ma; Bo Wen; Shuai Zhang; Qunyang Li; Ming Lei; Cheng Zhang; Irawan, Joshua; Li-Min Liu; Hui Wu
- Abstract
Photochemical solution-phase reactions have been widely applied for the syntheses of nanocrystals. In particular, tuning of the nucleation and growth of solids has been a major area of focus. Here we demonstrate a facile approach to generate atomically dispersed platinum via photochemical reduction of frozen chloroplatinic acid solution using ultraviolet light. Using this iced-photochemical reduction, the aggregation of atoms is prevented, and single atoms are successfully stabilized. The platinum atoms are deposited on various substrates, including mesoporous carbon, graphene, carbon nanotubes, titanium dioxide nanoparticles, and zinc oxide nanowires. The atomically dispersed platinum on mesoporous carbon exhibits efficient catalytic activity for the electrochemical hydrogen evolution reaction, with an overpotential of only 65 mV at a current density of 100 mA cm−2 and long-time durability (>10 h), superior to state-of-the-art platinum/carbon. This iced-photochemical reduction may be extended to other single atoms, for example gold and silver, as demonstrated in this study.
- Subjects
HYDROGEN evolution reactions; TITANIUM dioxide nanoparticles; METALS; CHLOROPLATINIC acid; DISCONTINUOUS precipitation; CARBON nanotubes
- Publication
Nature Communications, 2017, Vol 8, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-017-01521-4