NDLI: Stabilization of electrogenerated copper species on electrodes modified with quantum dots

Content Provider	Royal Society of Chemistry (RSC)
Author	Martín-Yerga, Daniel Costa-García, Agustín
Copyright Year	2017
Abstract	Quantum dots (QDs) have special optical, surface, and electronic properties that make them useful for electrochemical applications. In this work, the electrochemical behavior of copper in ammonia medium is described using bare screen-printed carbon electrodes and the same modified with CdSe/ZnS QDs. At the bare electrodes, the electrogenerated Cu(I) and Cu(0) species are oxidized by dissolved oxygen in a fast coupled chemical reaction, while at the QDs-modified electrode, the re-oxidation of Cu(I) and Cu(0) species can be observed, which indicates that they are stabilized by the nanocrystals present on the electrode surface. A weak adsorption is proposed as the main cause for this stabilization. The electrodeposition on electrodes modified with QDs allows the generation of random nanostructures with copper nanoparticles, avoiding the preferential nucleation onto the most active electrode areas.
Starting Page	5018
Ending Page	5027
Page Count	10
File Format	HTM / HTML PDF
ISSN	14639076
Volume Number	19
Issue Number	7
Journal	Physical Chemistry Chemical Physics
DOI	10.1039/c6cp07957a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ammonia Oxygen Electrode Nucleation Chemical reaction Adsorption Electrochemistry Copper Carbon Electrophoretic deposition
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry

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