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Reversible redox cycling of well-defined, ultrasmall Cu/Cu2O nanoparticles
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Pike, Sebastian D., White, Edward R., Regoutz, Anna, Sammy, Nicholas, Payne, David J., Williams, Charlotte K. and Shaffer, Milo S. P. (2017) Reversible redox cycling of well-defined, ultrasmall Cu/Cu2O nanoparticles. ACS Nano, 11 (3). pp. 2714-2723. doi:10.1021/acsnano.6b07694 ISSN 1936-0851.
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Official URL: http://dx.doi.org/10.1021/acsnano.6b07694
Abstract
Exceptionally small and well-defined copper (Cu) and cuprite (Cu2O) nanoparticles (NPs) are synthesized by the reaction of mesitylcopper(I) with either H2 or air, respectively. In the presence of substoichiometric quantities of ligands, namely, stearic or di(octyl)phosphinic acid (0.1–0.2 equiv vs Cu), ultrasmall nanoparticles are prepared with diameters as low as ∼2 nm, soluble in a range of solvents. The solutions of Cu NPs undergo quantitative oxidation, on exposure to air, to form Cu2O NPs. The Cu2O NPs can be reduced back to Cu(0) NPs using accessible temperatures and low pressures of hydrogen (135 °C, 3 bar H2). This striking reversible redox cycling of the discrete, solubilized Cu/Cu(I) colloids was successfully repeated over 10 cycles, representing 19 separate reactions. The ligands influence the evolution of both composition and size of the nanoparticles, during synthesis and redox cycling, as explored in detail using vacuum-transfer aberration-corrected transmission electron microscopy, X-ray photoelectron spectroscopy, and visible spectroscopy.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QD Chemistry Q Science > QH Natural history |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||||||
Library of Congress Subject Headings (LCSH): | Nanoparticles, Organocopper compounds, Copper oxide, Oxidation-reduction reaction, Transmission electron microscopy | ||||||||||||
Journal or Publication Title: | ACS Nano | ||||||||||||
Publisher: | American Chemical Society | ||||||||||||
ISSN: | 1936-0851 | ||||||||||||
Official Date: | 28 March 2017 | ||||||||||||
Dates: |
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Volume: | 11 | ||||||||||||
Number: | 3 | ||||||||||||
Page Range: | pp. 2714-2723 | ||||||||||||
DOI: | 10.1021/acsnano.6b07694 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
Date of first compliant deposit: | 31 October 2019 | ||||||||||||
Date of first compliant Open Access: | 31 October 2019 | ||||||||||||
RIOXX Funder/Project Grant: |
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