Channel Flow Cell for Attenuated Total Reflection Fourier Transform Infrared Spectroelectrochemistry

Rachael Barbour, Zhenghao Wang, In Tae Bae, Yuriy V. Tolmachev, Daniel Alberto Scherson

研究成果: Article

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A channel-type spectroelectrochemical cell is described for the acquisition of potential difference (PD) attenuated total reflection Fourier transform infrared (ATR-FT-IR) spectroscopy of solution phase species generated at an electrode surface under conditions of well-defined laminar flow. The capabilities of the cell have been assessed using the reduction of bisulfite (2 M) in a weakly acidic (pH = 5.25), unbuffered, aqueous electrolyte as a model system. The PD ATR-FT-IR spectrum obtained at -0.85 V vs SCE, a potential negative enough for the reduction of HSO3-to proceed, compared to the spectrum recorded at a potential at which no reaction occurs (0.0 V vs SCE) as a reference, was dominated by negative- and positivepointing contributions due to the reactant, bisulfite, and the predominant product, dithionite, respectively. Also identified in the spectrum was sulfite, which is produced by the dissociation of bisulfite induced by the increase in the pH of the medium during the reduction reaction. Theoretical aspects regarding the quantitative analysis of these data are briefly discussed.

元の言語English
ページ(範囲)4024-4027
ページ数4
ジャーナルAnalytical chemistry
67
発行部数21
DOI
出版物ステータスPublished - 1995 1 1
外部発表Yes

ASJC Scopus subject areas

  • Analytical Chemistry

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