期刊
SMALL
卷 14, 期 32, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201801765
关键词
chloride ions; cyclic voltammetry; environmental fate; nitrate ions; single copper oxide nanoparticles electrochemistry
类别
资金
- European Research Council under European Union/ERC [320403]
- U.S. Public Health Service Grant [RO1 ES016746]
- Environmental Protection Agency [DBI 0830117, 1266377]
- German Research Foundation (DFG) [TH 893/21-1]
The electrochemical behavior of copper oxide nanoparticles is investigated at both the single particle and at the ensemble level in neutral aqueous solutions through the electrode-particle collision method and cyclic voltammetry, respectively. The influence of Cl- and NO3- anions on the electrochemical processes occurring at the nanoparticles is further evaluated. The electroactivity of CuO nanoparticles is found to differ between the two types of experiments. At the single-particle scale, the reduction of the CuO nanoparticles proceeds to a higher extent in the presence of chloride ion than of nitrate ion containing solutions. However, at the multiparticle scale the CuO reduction proceeds to the same extent regardless of the type of anions present in solution. The implications for assessing realistically the environmental fate and therefore the toxicity of metal-based nanoparticles in general, and copper-based nanoparticles in particular, are discussed.
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