About: Voltage-step Transient in Redox Systems III. Effect of the Current Primary Distribution via Nernst Model

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About: Voltage-step Transient in Redox Systems III. Effect of the Current Primary Distribution via Nernst Model Goto Sponge NotDistinct Permalink

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Description	In addition to the common transient diffusion (Cottrell), there are further transport results that cannot be neglected: Faradic resistance at surface of the working electrode, and Ohmic resistance in the bulk of streaming electrolyte solution between the working and counter electrodes. These additional resistances are analyzed here for the voltage-step transient (VST) process using the Nernst model of a two-electrode cell (no reference electrode). The Faradic resistance is considered for a single redox couple O + ne- = R according to Butler-Volmer electrode kinetics. The effect of Ohmic and Faradic resistances in VST is accounted for using two models: the recently updated 1D approximation and a new model that accepts primary current distribution for a circular electrode. It is shown that the 1D approximation introduces unacceptable errors. In addition to the common transient diffusion (Cottrell), there are further transport results that cannot be neglected: Faradic resistance at surface of the working electrode, and Ohmic resistance in the bulk of streaming electrolyte solution between the working and counter electrodes. These additional resistances are analyzed here for the voltage-step transient (VST) process using the Nernst model of a two-electrode cell (no reference electrode). The Faradic resistance is considered for a single redox couple O + ne- = R according to Butler-Volmer electrode kinetics. The effect of Ohmic and Faradic resistances in VST is accounted for using two models: the recently updated 1D approximation and a new model that accepts primary current distribution for a circular electrode. It is shown that the 1D approximation introduces unacceptable errors. (en)
Title	Voltage-step Transient in Redox Systems III. Effect of the Current Primary Distribution via Nernst Model Voltage-step Transient in Redox Systems III. Effect of the Current Primary Distribution via Nernst Model (en)
skos:prefLabel	Voltage-step Transient in Redox Systems III. Effect of the Current Primary Distribution via Nernst Model Voltage-step Transient in Redox Systems III. Effect of the Current Primary Distribution via Nernst Model (en)
skos:notation	RIV/67985858:_____/10:00360483!RIV12-AV0-67985858
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA104/08/0428), Z(AV0Z40720504)
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Wein, Ondřej
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	296670
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/10:00360483
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	distributed nernst model; ohmic and faradic resistance; primary current distribution (en)
http://linked.open.../riv/klicoveSlovo	primary current distribution distributed nernst model ohmic and faradic resistance
http://linked.open...ontrolniKodProRIV	[897B43335808]
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	1 (xsd:int)
http://linked.open...vavai/riv/projekt	Effect of the surface roughness, ohmic resistance, and electrode kinetics on autocalibration of electrodiffusion friction probes
http://linked.open...UplatneniVysledku	2010
http://linked.open...iv/tvurceVysledku	Wein, Ondřej
http://linked.open...n/vavai/riv/zamer	Investigation of multiphase reacting systems for the design of processes important in synthesis and preparation of novel materials, in energy production and in environmental protection

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