About: Voltage-step Transient in Redox Systems II. 1D Approximation (revisited)

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Description	Using the well-known Cottrell asymptote, voltage-step transient experiment could provide data on bulk concentration and diffusion coefficient of working depolarizer, essential in the liming-current techniques. However, the Cottrell asymptote is not directly applicable in an early stage of the voltage-step transient process,. There are three additional transport resistances that cannot be neglected at extremely high initial currents: Faradaic resistance at surface of working electrode, Ohmic losses in its intimate neighborhood, and the galvanometric constraint in the outer circuit (galvanometer, current follower, potentiostat). Non-linear effect of these additional transport resistances on the transient current is calculated in a 1D approximation, i.e. assuming uniform accessibility of the working electrode, for finite voltage steps. Using the well-known Cottrell asymptote, voltage-step transient experiment could provide data on bulk concentration and diffusion coefficient of working depolarizer, essential in the liming-current techniques. However, the Cottrell asymptote is not directly applicable in an early stage of the voltage-step transient process,. There are three additional transport resistances that cannot be neglected at extremely high initial currents: Faradaic resistance at surface of working electrode, Ohmic losses in its intimate neighborhood, and the galvanometric constraint in the outer circuit (galvanometer, current follower, potentiostat). Non-linear effect of these additional transport resistances on the transient current is calculated in a 1D approximation, i.e. assuming uniform accessibility of the working electrode, for finite voltage steps. (en)
Title	Voltage-step Transient in Redox Systems II. 1D Approximation (revisited) Voltage-step Transient in Redox Systems II. 1D Approximation (revisited) (en)
skos:prefLabel	Voltage-step Transient in Redox Systems II. 1D Approximation (revisited) Voltage-step Transient in Redox Systems II. 1D Approximation (revisited) (en)
skos:notation	RIV/67985858:_____/10:00346534!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	296669
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/10:00346534
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	voltage-step transient; cottrell asymptote; ohmic loss (en)
http://linked.open.../riv/klicoveSlovo	cottrell asymptote ohmic loss voltage-step transient
http://linked.open...ontrolniKodProRIV	[D9A495788A2C]
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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