In Situ Spectroscopic Determination of Faradaic Efficiencies in Systems with Forced Convection under Steady State

Electroreduction of Bisulfite to Dithionite on Gold in an Aqueous Electrolyte

Yuriy V. Tolmachev, Zhenghao Wang, Yining Hu, In Tae Bae, Daniel Alberto Scherson

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The reduction of bisulfite on Au electrodes in buffered aqueous solutions (pH = 5.25) was examined by in situ near-normal-incidence UV-visible reflection absorption spectroscopy on a rotating disk electrode (RDE) and in situ transmission UV-visible spectroscopy downstream from a channel-type electrode. The currents associated with dithionite (S2O42-) formation obtained from the spectroscopic measurements were found to be lower than those expected for a one-electron, diffusion-controlled process. Faradaic efficiencies for S2O42- generation derived from RDE data yielded, in the range -0.60 to -0.75 V vs Ag/AgCl, values close to 100%. The advantages of rotating disk over channel-type electrodes for determining faradaic efficiencies by UV-visible spectroscopic techniques are discussed.

Original languageEnglish
Pages (from-to)1149-1155
Number of pages7
JournalAnalytical chemistry
Volume70
Issue number6
DOIs
Publication statusPublished - 1998 Mar 15
Externally publishedYes

Fingerprint

Dithionite
Forced convection
Gold
Electrolytes
Rotating disks
Electrodes
Absorption spectroscopy
hydrogen sulfite
Spectroscopy
Electrons

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

In Situ Spectroscopic Determination of Faradaic Efficiencies in Systems with Forced Convection under Steady State : Electroreduction of Bisulfite to Dithionite on Gold in an Aqueous Electrolyte. / Tolmachev, Yuriy V.; Wang, Zhenghao; Hu, Yining; Bae, In Tae; Scherson, Daniel Alberto.

In: Analytical chemistry, Vol. 70, No. 6, 15.03.1998, p. 1149-1155.

Research output: Contribution to journalArticle

@article{a46ff78548f14a13b4fdae521421aed0,
title = "In Situ Spectroscopic Determination of Faradaic Efficiencies in Systems with Forced Convection under Steady State: Electroreduction of Bisulfite to Dithionite on Gold in an Aqueous Electrolyte",
abstract = "The reduction of bisulfite on Au electrodes in buffered aqueous solutions (pH = 5.25) was examined by in situ near-normal-incidence UV-visible reflection absorption spectroscopy on a rotating disk electrode (RDE) and in situ transmission UV-visible spectroscopy downstream from a channel-type electrode. The currents associated with dithionite (S2O42-) formation obtained from the spectroscopic measurements were found to be lower than those expected for a one-electron, diffusion-controlled process. Faradaic efficiencies for S2O42- generation derived from RDE data yielded, in the range -0.60 to -0.75 V vs Ag/AgCl, values close to 100{\%}. The advantages of rotating disk over channel-type electrodes for determining faradaic efficiencies by UV-visible spectroscopic techniques are discussed.",
author = "Tolmachev, {Yuriy V.} and Zhenghao Wang and Yining Hu and Bae, {In Tae} and Scherson, {Daniel Alberto}",
year = "1998",
month = "3",
day = "15",
doi = "10.1021/ac970697f",
language = "English",
volume = "70",
pages = "1149--1155",
journal = "Analytical Chemistry",
issn = "0003-2700",
publisher = "American Chemical Society",
number = "6",

}

TY - JOUR

T1 - In Situ Spectroscopic Determination of Faradaic Efficiencies in Systems with Forced Convection under Steady State

T2 - Electroreduction of Bisulfite to Dithionite on Gold in an Aqueous Electrolyte

AU - Tolmachev, Yuriy V.

AU - Wang, Zhenghao

AU - Hu, Yining

AU - Bae, In Tae

AU - Scherson, Daniel Alberto

PY - 1998/3/15

Y1 - 1998/3/15

N2 - The reduction of bisulfite on Au electrodes in buffered aqueous solutions (pH = 5.25) was examined by in situ near-normal-incidence UV-visible reflection absorption spectroscopy on a rotating disk electrode (RDE) and in situ transmission UV-visible spectroscopy downstream from a channel-type electrode. The currents associated with dithionite (S2O42-) formation obtained from the spectroscopic measurements were found to be lower than those expected for a one-electron, diffusion-controlled process. Faradaic efficiencies for S2O42- generation derived from RDE data yielded, in the range -0.60 to -0.75 V vs Ag/AgCl, values close to 100%. The advantages of rotating disk over channel-type electrodes for determining faradaic efficiencies by UV-visible spectroscopic techniques are discussed.

AB - The reduction of bisulfite on Au electrodes in buffered aqueous solutions (pH = 5.25) was examined by in situ near-normal-incidence UV-visible reflection absorption spectroscopy on a rotating disk electrode (RDE) and in situ transmission UV-visible spectroscopy downstream from a channel-type electrode. The currents associated with dithionite (S2O42-) formation obtained from the spectroscopic measurements were found to be lower than those expected for a one-electron, diffusion-controlled process. Faradaic efficiencies for S2O42- generation derived from RDE data yielded, in the range -0.60 to -0.75 V vs Ag/AgCl, values close to 100%. The advantages of rotating disk over channel-type electrodes for determining faradaic efficiencies by UV-visible spectroscopic techniques are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0001522827&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001522827&partnerID=8YFLogxK

U2 - 10.1021/ac970697f

DO - 10.1021/ac970697f

M3 - Article

VL - 70

SP - 1149

EP - 1155

JO - Analytical Chemistry

JF - Analytical Chemistry

SN - 0003-2700

IS - 6

ER -