Porous Teflon ring-solid disk electrode arrangement for differential mass spectrometry measurements in the presence of convective flow generated by a jet impinging electrode in the wall-jet configuration

Imre Treufeld, Adriel Jebin Jacob Jebaraj, Jing Xu, Denis Martins De Godoi, Daniel Alberto Scherson

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A porous Teflon ring|solid disk electrode is herein described specifically designed for acquiring online mass spectrometric measurements under well-defined forced convection created by liquid emerging from a circular nozzle impinging on the disk under wall-jet conditions. Measurements were performed for the oxidation of hydrazine, N 2H 4, in a deaerated phosphate buffer electrolyte (pH 7) on Au, a process known to yield dinitrogen as the product. The N2 + ion currents, measured by the mass spectrometer, i(N2 +), as well as the corresponding polarization curves recorded simultaneously displayed very similar s-like shapes when plotted as a function of the potential applied to the Au disk. In fact, the limiting currents observed both electrochemically and spectrometrically were found to be proportional to [N 2H 4]. However, the limiting values of i(N2 +) did not increase monotonically with the flow rate, ν f, reaching instead a maximum and then decreasing to values independent of ν f. This behavior has been attributed in part to hindrances in the mass transport of gases through the porous materials.

Original languageEnglish
Pages (from-to)5175-5179
Number of pages5
JournalAnalytical chemistry
Volume84
Issue number12
DOIs
Publication statusPublished - 2012 Jun 19
Externally publishedYes

Fingerprint

hydrazine
Polytetrafluoroethylene
Mass spectrometry
Electrodes
Forced convection
Mass spectrometers
Electrolytes
Porous materials
Nozzles
Buffers
Mass transfer
Gases
Phosphates
Flow rate
Ions
Polarization
Oxidation
Liquids

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Porous Teflon ring-solid disk electrode arrangement for differential mass spectrometry measurements in the presence of convective flow generated by a jet impinging electrode in the wall-jet configuration. / Treufeld, Imre; Jebaraj, Adriel Jebin Jacob; Xu, Jing; Martins De Godoi, Denis; Scherson, Daniel Alberto.

In: Analytical chemistry, Vol. 84, No. 12, 19.06.2012, p. 5175-5179.

Research output: Contribution to journalArticle

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