Nanoparticle-electrode impacts: the oxidation of copper nanoparticles has slow kinetics.
The electrochemical oxidation of copper nanoparticles in aqueous solution was studied via their electrolysis upon impacting a carbon electrode held at a suitable anodic potential. The oxidations were found to be quantitative such that complete oxidation of the particle took place allowing their sizi...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2012
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| _version_ | 1797097906067472384 |
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| author | Haddou, B Rees, N Compton, R |
| author_facet | Haddou, B Rees, N Compton, R |
| author_sort | Haddou, B |
| collection | OXFORD |
| description | The electrochemical oxidation of copper nanoparticles in aqueous solution was studied via their electrolysis upon impacting a carbon electrode held at a suitable anodic potential. The oxidations were found to be quantitative such that complete oxidation of the particle took place allowing their sizing. Experiments were performed in 1.0 M HNO(3) and in 1.0 M HNO(3)-0.1 M KCl. In the former case a two electron oxidation to Cu(2+) was seen at a formal potential of +0.11 V (vs. SCE). In the latter case two separate one-electron oxidations at -0.01 V and +0.26 V were seen. In addition, theoretical results were derived for the analysis of impact-charge vs. potential data for reversible and irreversible charge transfer kinetics for nanoparticle oxidation. This enabled the inference that overpotential is required for the oxidations and Butler-Volmer transfer coefficients to be determined. The latter are compared with literature data seen for macroscopic copper. |
| first_indexed | 2024-03-07T05:02:00Z |
| format | Journal article |
| id | oxford-uuid:d8949564-5b0a-466e-b6b1-a024aa563696 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:02:00Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:d8949564-5b0a-466e-b6b1-a024aa5636962022-03-27T08:49:51ZNanoparticle-electrode impacts: the oxidation of copper nanoparticles has slow kinetics.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d8949564-5b0a-466e-b6b1-a024aa563696EnglishSymplectic Elements at Oxford2012Haddou, BRees, NCompton, RThe electrochemical oxidation of copper nanoparticles in aqueous solution was studied via their electrolysis upon impacting a carbon electrode held at a suitable anodic potential. The oxidations were found to be quantitative such that complete oxidation of the particle took place allowing their sizing. Experiments were performed in 1.0 M HNO(3) and in 1.0 M HNO(3)-0.1 M KCl. In the former case a two electron oxidation to Cu(2+) was seen at a formal potential of +0.11 V (vs. SCE). In the latter case two separate one-electron oxidations at -0.01 V and +0.26 V were seen. In addition, theoretical results were derived for the analysis of impact-charge vs. potential data for reversible and irreversible charge transfer kinetics for nanoparticle oxidation. This enabled the inference that overpotential is required for the oxidations and Butler-Volmer transfer coefficients to be determined. The latter are compared with literature data seen for macroscopic copper. |
| spellingShingle | Haddou, B Rees, N Compton, R Nanoparticle-electrode impacts: the oxidation of copper nanoparticles has slow kinetics. |
| title | Nanoparticle-electrode impacts: the oxidation of copper nanoparticles has slow kinetics. |
| title_full | Nanoparticle-electrode impacts: the oxidation of copper nanoparticles has slow kinetics. |
| title_fullStr | Nanoparticle-electrode impacts: the oxidation of copper nanoparticles has slow kinetics. |
| title_full_unstemmed | Nanoparticle-electrode impacts: the oxidation of copper nanoparticles has slow kinetics. |
| title_short | Nanoparticle-electrode impacts: the oxidation of copper nanoparticles has slow kinetics. |
| title_sort | nanoparticle electrode impacts the oxidation of copper nanoparticles has slow kinetics |
| work_keys_str_mv | AT haddoub nanoparticleelectrodeimpactstheoxidationofcoppernanoparticleshasslowkinetics AT reesn nanoparticleelectrodeimpactstheoxidationofcoppernanoparticleshasslowkinetics AT comptonr nanoparticleelectrodeimpactstheoxidationofcoppernanoparticleshasslowkinetics |