Abstract
Cyclic voltammetry and dynamic and steady state polarization measurements have been used to examine the electrocatalytic activity of glassy carbon, GC, bearing a layer of adsorbed hemin, Hm, Hm | GC, toward hydroxylamine, NH2OH, in neutral aqueous solutions. The results obtained have provided ample evidence that Hm | GC promotes the reduction and oxidation of NH2OH, as well as its disproportionation. Also presented is a mechanistic model that accounts quantitatively for steady state polarization data for the reduction of NH2OH recorded with a Hm | GC rotating disk electrode, RDE. This model predicts that a very large fraction of the current is attributed to the reduction of a Hm species axially coordinated by a NH2OH molecule on one side and a nitrosyl group on the other at lower overpotentials and NH2OH on either side at higher overpotentials.
| Original language | English |
|---|---|
| Pages (from-to) | 250-256 |
| Number of pages | 7 |
| Journal | Journal of Electroanalytical Chemistry |
| Volume | 793 |
| DOIs | |
| Publication status | Published - 2017 May 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Analytical Chemistry
- Chemical Engineering(all)
- Electrochemistry
Cite this
The electrocatalytic properties of adsorbed hemin and its nitrosyl adduct on glassy carbon surfaces toward hydroxylamine in aqueous neutral electrolytes. / Kannan, Balaji; Kumsa, Doe; Jebaraj, Adriel Jebin; Méndez-Albores, Alia; Georgescu, Nicholas S.; Scherson, Daniel Alberto.
In: Journal of Electroanalytical Chemistry, Vol. 793, 15.05.2017, p. 250-256.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The electrocatalytic properties of adsorbed hemin and its nitrosyl adduct on glassy carbon surfaces toward hydroxylamine in aqueous neutral electrolytes
AU - Kannan, Balaji
AU - Kumsa, Doe
AU - Jebaraj, Adriel Jebin
AU - Méndez-Albores, Alia
AU - Georgescu, Nicholas S.
AU - Scherson, Daniel Alberto
PY - 2017/5/15
Y1 - 2017/5/15
N2 - Cyclic voltammetry and dynamic and steady state polarization measurements have been used to examine the electrocatalytic activity of glassy carbon, GC, bearing a layer of adsorbed hemin, Hm, Hm | GC, toward hydroxylamine, NH2OH, in neutral aqueous solutions. The results obtained have provided ample evidence that Hm | GC promotes the reduction and oxidation of NH2OH, as well as its disproportionation. Also presented is a mechanistic model that accounts quantitatively for steady state polarization data for the reduction of NH2OH recorded with a Hm | GC rotating disk electrode, RDE. This model predicts that a very large fraction of the current is attributed to the reduction of a Hm species axially coordinated by a NH2OH molecule on one side and a nitrosyl group on the other at lower overpotentials and NH2OH on either side at higher overpotentials.
AB - Cyclic voltammetry and dynamic and steady state polarization measurements have been used to examine the electrocatalytic activity of glassy carbon, GC, bearing a layer of adsorbed hemin, Hm, Hm | GC, toward hydroxylamine, NH2OH, in neutral aqueous solutions. The results obtained have provided ample evidence that Hm | GC promotes the reduction and oxidation of NH2OH, as well as its disproportionation. Also presented is a mechanistic model that accounts quantitatively for steady state polarization data for the reduction of NH2OH recorded with a Hm | GC rotating disk electrode, RDE. This model predicts that a very large fraction of the current is attributed to the reduction of a Hm species axially coordinated by a NH2OH molecule on one side and a nitrosyl group on the other at lower overpotentials and NH2OH on either side at higher overpotentials.
UR - http://www.scopus.com/inward/record.url?scp=85012877816&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85012877816&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2017.02.017
DO - 10.1016/j.jelechem.2017.02.017
M3 - Article
VL - 793
SP - 250
EP - 256
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 0022-0728
ER -