Investigating the viability of electrodeposited vanadium pentoxide as a suitable electrode material for in vivo amperometric hydrogen sulfide detection

Jason Alan Bennett, James E.Pander Iii, Marc A. Neiswonger

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A vanadium pentoxide (V2O5) film was electrodeposited onto the end of a PtIr wire (d = 125 μm) via potential cycling in order to preliminarily assess its viability as a prospective material for in vivo H 2S monitoring. The deposited oxide film exhibited catalytic activity towards the oxidation of H2S in a physiologically relevant pH buffer solution, which resulted in a large increase in peak current compared to that exhibited by the bare PtIr surface. The modified electrode exhibited a linear response over a total sulfide concentration range of 0.5-15 μM. The catalytic activity of the V2O5-modified wire towards the oxidation of upper physiological levels of NO and CO, two gaseous interferences found in vivo, was investigated using amperometry. While the electrode demonstrated some activity towards NO, it exhibited significant activity towards CO in the potential region of interest. However, the response towards NO and CO was much slower than the response towards H2S and the linear range remained unchanged despite the presence of the interfering gases.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume654
Issue number1-2
DOIs
StatePublished - May 1 2011

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Hydrogen Sulfide
Hydrogen sulfide
Carbon Monoxide
Vanadium
Catalyst activity
Wire
Oxidation
Electrodes
Oxide films
Sulfides
Monitoring
Buffers
Gases
vanadium pentoxide

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

Cite this

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abstract = "A vanadium pentoxide (V2O5) film was electrodeposited onto the end of a PtIr wire (d = 125 μm) via potential cycling in order to preliminarily assess its viability as a prospective material for in vivo H 2S monitoring. The deposited oxide film exhibited catalytic activity towards the oxidation of H2S in a physiologically relevant pH buffer solution, which resulted in a large increase in peak current compared to that exhibited by the bare PtIr surface. The modified electrode exhibited a linear response over a total sulfide concentration range of 0.5-15 μM. The catalytic activity of the V2O5-modified wire towards the oxidation of upper physiological levels of NO and CO, two gaseous interferences found in vivo, was investigated using amperometry. While the electrode demonstrated some activity towards NO, it exhibited significant activity towards CO in the potential region of interest. However, the response towards NO and CO was much slower than the response towards H2S and the linear range remained unchanged despite the presence of the interfering gases.",
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Investigating the viability of electrodeposited vanadium pentoxide as a suitable electrode material for in vivo amperometric hydrogen sulfide detection. / Bennett, Jason Alan; Iii, James E.Pander; Neiswonger, Marc A.

In: Journal of Electroanalytical Chemistry, Vol. 654, No. 1-2, 01.05.2011, p. 1-7.

Research output: Contribution to journalArticle

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