Digital Simulation of a Rotating Disk Electrode with Optically Transparent Ring

Dörr, R.; Grabner, E. W.

doi:10.1002/bbpc.197800005

Cited by 9 publications

(1 citation statement)

References 4 publications

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“…On this basis, the total amount of product over the volume of solution above an arbitrary section of the electrode, e.g., X0 <X < X2, with X1, JC 1, can be obtained from Eq. 14 written in terms of the dimensionless variables given in Table I x -N001 = K-1Sclw 8(X', Y)dYdX' 00 = N0{A(X3; a) -A(X1; a)} [24] where X = (DP/DR)213(k/k), 8 = (2vJDlh)"3, N0 = 1w, and A(X; a) = .f I(X'; a)dX'.…”

Section: Applicationsmentioning

confidence: 99%

In Situ Spectroscopy in the Presence of Convective Flow under Steady‐State Conditions: A Unified Mathematical Formalism

Tolmachev

Wang

Scherson

1996

J. Electrochem. Soc.

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A generalized mathematical treatment is presented that enables a quantitative analysis of various in situ spectroscopi.c experiments involving detection of solution-phase species generated at the surface of rotating disk and ring-disk, channel, and tube-type electrodes under steady state. This theory is valid for experimental conditions easily realizable in the laboratory and is only applicable to first-order irreversible heterogeneous electron-transfer processes without complications derived from homogeneous phase reactions. Illustrations of the advantages of this formalism are provided, including a rederivation of equations obtained by other authors, an analytic route to the solution of the rotating disktransparent ring electrode, and various aspects of normal incidence reflection absorption spectroscopy at rotating ring and ring-disk electrodes. The results were in excellent agreement with those of other workers (when available), and in some cases, yielded better accuracy than solutions generated by digital simulation techniques reported in the literature.

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Section: Applicationsmentioning

confidence: 99%

In Situ Spectroscopy in the Presence of Convective Flow under Steady‐State Conditions: A Unified Mathematical Formalism

Tolmachev

Wang

Scherson

1996

J. Electrochem. Soc.

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Ultraviolet/Visible Spectroelectrochemistry

Scherson

Tolmachev

Stefan

2000

Encyclopedia of Analytical Chemistry

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This article reviews the field of solution‐phase ultraviolet/visible (UV/VIS) absorption spectroelectrochemistry and its application to problems in thermodynamics, kinetics, and mass transport, with emphasis on both experimental and theoretical aspects. Examples are provided for transmission in thin layer and semi‐infinite media, using optically transparent electrodes, and external and internal reflection in quiescent media. Also illustrated is the coupling of UV/VIS spectroscopy to systems under forced convection, such as rotating disk and channel electrodes, under steady state and transient conditions. Attention is also focused on spatially resolved spectroelectrochemistry for the imaging of diffusion and reaction layers. The last section is devoted to the more complex and particularly powerful modulation techniques involving diffraction, refraction and absorption in stagnant media and in the presence of convective flow. Factors that limit the sensitivity and spatial and temporal resolution of UV/VIS absorption spectroelectrochemistry, as well as its future prospects in analytical chemistry are briefly discussed.

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Investigation of a Homogeneous Second Order Reaction Using the Rotating Disc Electrode with Optically Transparent Ring

Debrodt

Heusler

Grabner

1979

Ber Bunsenges Phys Chem

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Absorpiionsspektren, sichtbar und ultraviolett I Apparate und Methoden I Elektrochemie I ReaktionskinetikThe electrochemical oxidation of N,N,N',N'-tetraphenyl-p-phenylenediamine to the corresponding quinonediimine is followed by a conproportionation to the semiquinoneimine. The reaction was investigated by spectrophotometry at the rotating disc electrode with optically transparent ring. Working curves relating dimensionless relative extinctions to dimensionless times were calculated by digital simulation for the general reaction scheme A & ne e Q at the disc electrode followed by A + Q = 2s in solution. Collection efficiency, material balance, and shape of the working curve exhibited excellent agreement of calculations to the experiments. The rate constants of conproportionation were determined at temperatures between 230 K and 300 K. Auf die elektrochemische Oxidation von N,N,N',N'-Tetraphenyl-p-phenylendiamin zu dem entsprechendenChinondiimin folgt die Konproportionierung zum Semichinonimin. Diese Reaktion wurde spektralphotometrisch an einer rotierenden Scheibenelektrode mit optisch transparentem Ring untersucht. Arbeitskurven fur die Beziehung zwischen dimensionslosen, relativen Extinktionen und dimensionslosen Zeiten wurden durch digitale Simulation berechnet fur das Reaktionsschema A & ne Q an der Scheibenelektrode und A + Q = 2s in der Losung. Der Ausbeutefaktor, die Stoffbilanz und die Form der Arbeitskurve ergaben gute Ubereinstimmung zwischen Rechnung und Experiment. Die Geschwindigkeitskonstante der Konproportionierung wurde bei Temperaturen zwischen 230 K und 300 K bestimmt.

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Digital Simulation of a Rotating Disk Electrode with Optically Transparent Ring

Cited by 9 publications

References 4 publications

In Situ Spectroscopy in the Presence of Convective Flow under Steady‐State Conditions: A Unified Mathematical Formalism

In Situ Spectroscopy in the Presence of Convective Flow under Steady‐State Conditions: A Unified Mathematical Formalism

Ultraviolet/Visible Spectroelectrochemistry

Investigation of a Homogeneous Second Order Reaction Using the Rotating Disc Electrode with Optically Transparent Ring

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