Abstract
A method is herein described that allows for solution phase superoxide generated via the reduction of dioxygen in neutral aqueous solutions at a rotating disk electrode to be oxidized at a concentric Au ring electrode bearing a covalently linked monolayer of 3-mercapto-1-propanol, a modified surface that blocks the oxidation of solution phase of hydrogen peroxide. Experiments were performed in which the potential of a glassy carbon disk electrode was linearly scanned in the oxygen reduction region and the ring voltage was poised at a value at which superoxide oxidation ensued yielded bell-shaped ring currents. This behavior is consistent with changes in the relative rates constant for the processes involved in the mechanism of oxygen reduction on this carbonaceous material induced by the applied potential which so far had remained undetected using other techniques.
| Original language | English |
|---|---|
| Pages (from-to) | 1088-1091 |
| Number of pages | 4 |
| Journal | Analytical chemistry |
| Volume | 88 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2016 Jan 19 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Analytical Chemistry
Cite this
Rotating Ring-Disk Electrode Method for the Detection of Solution Phase Superoxide as a Reaction Intermediate of Oxygen Reduction in Neutral Aqueous Solutions. / Feng, Zhange; Georgescu, Nicholas S.; Scherson, Daniel Alberto.
In: Analytical chemistry, Vol. 88, No. 2, 19.01.2016, p. 1088-1091.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Rotating Ring-Disk Electrode Method for the Detection of Solution Phase Superoxide as a Reaction Intermediate of Oxygen Reduction in Neutral Aqueous Solutions
AU - Feng, Zhange
AU - Georgescu, Nicholas S.
AU - Scherson, Daniel Alberto
PY - 2016/1/19
Y1 - 2016/1/19
N2 - A method is herein described that allows for solution phase superoxide generated via the reduction of dioxygen in neutral aqueous solutions at a rotating disk electrode to be oxidized at a concentric Au ring electrode bearing a covalently linked monolayer of 3-mercapto-1-propanol, a modified surface that blocks the oxidation of solution phase of hydrogen peroxide. Experiments were performed in which the potential of a glassy carbon disk electrode was linearly scanned in the oxygen reduction region and the ring voltage was poised at a value at which superoxide oxidation ensued yielded bell-shaped ring currents. This behavior is consistent with changes in the relative rates constant for the processes involved in the mechanism of oxygen reduction on this carbonaceous material induced by the applied potential which so far had remained undetected using other techniques.
AB - A method is herein described that allows for solution phase superoxide generated via the reduction of dioxygen in neutral aqueous solutions at a rotating disk electrode to be oxidized at a concentric Au ring electrode bearing a covalently linked monolayer of 3-mercapto-1-propanol, a modified surface that blocks the oxidation of solution phase of hydrogen peroxide. Experiments were performed in which the potential of a glassy carbon disk electrode was linearly scanned in the oxygen reduction region and the ring voltage was poised at a value at which superoxide oxidation ensued yielded bell-shaped ring currents. This behavior is consistent with changes in the relative rates constant for the processes involved in the mechanism of oxygen reduction on this carbonaceous material induced by the applied potential which so far had remained undetected using other techniques.
UR - http://www.scopus.com/inward/record.url?scp=84955488034&partnerID=8YFLogxK
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U2 - 10.1021/acs.analchem.5b04346
DO - 10.1021/acs.analchem.5b04346
M3 - Article
VL - 88
SP - 1088
EP - 1091
JO - Analytical Chemistry
JF - Analytical Chemistry
SN - 0003-2700
IS - 2
ER -