Journal article
Dopamine oxidation at gold electrodes: mechanism and kinetics near neutral pH
- Abstract:
- The two-electron electrochemical oxidation of dopamine is studied voltammetrically at gold macroelectrodes around neutral pH with simulations used to give kinetic and mechanistic data. In particular, the system shows "potential inversion" in which the thermodynamic oxidation potential of dopamine to form the corresponding semi-quinone formation occurs at a more positive potential than that of the oxidation of the semi-quinone to the quinone form. The use of Tafel slopes measured from the voltammograms as a function of the voltage scan rate is show to be a particularly sensitive indicator of mechanism showing the effect of the follow-up chemistry in which the two-electron oxidation product undergoes an irreversible cyclization reaction.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 2.6MB, Terms of use)
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- Publisher copy:
- 10.1039/c9cp05527d
Authors
- Publisher:
- Royal Society of Chemistry
- Journal:
- Physical Chemistry Chemical Physics More from this journal
- Volume:
- 22
- Issue:
- 2
- Pages:
- 607-614
- Publication date:
- 2019-11-20
- Acceptance date:
- 2019-11-20
- DOI:
- EISSN:
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1463-9084
- ISSN:
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1463-9076
- Pmid:
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31776536
- Language:
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English
- Keywords:
- Pubs id:
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pubs:1075764
- UUID:
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uuid:11d17b1c-c56e-49bf-9927-47f4d720e35f
- Local pid:
-
pubs:1075764
- Source identifiers:
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1075764
- Deposit date:
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2019-12-02
- ARK identifier:
Terms of use
- Copyright holder:
- the Owner Societies
- Copyright date:
- 2019
- Rights statement:
- © the Owner Societies 2019
- Notes:
-
This is the accepted manuscript version of the article. The final version is available from Royal Society of Chemistry at https://doi.org/10.1039/C9CP05527D
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