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Statements

Subject Item
n2:RIV%2F67985858%3A_____%2F10%3A00346534%21RIV12-AV0-67985858
rdf:type
skos:Concept n13:Vysledek
dcterms: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.
dcterms:title
Voltage-step Transient in Redox Systems II. 1D Approximation (revisited) Voltage-step Transient in Redox Systems II. 1D Approximation (revisited)
skos:prefLabel
Voltage-step Transient in Redox Systems II. 1D Approximation (revisited) Voltage-step Transient in Redox Systems II. 1D Approximation (revisited)
skos:notation
RIV/67985858:_____/10:00346534!RIV12-AV0-67985858
n5:aktivita
n15:Z n15:P
n5:aktivity
P(GA104/08/0428), Z(AV0Z40720504)
n5:dodaniDat
n7:2012
n5:domaciTvurceVysledku
n16:3638782
n5:druhVysledku
n6:O
n5:duvernostUdaju
n10:S
n5:entitaPredkladatele
n11:predkladatel
n5:idSjednocenehoVysledku
296669
n5:idVysledku
RIV/67985858:_____/10:00346534
n5:jazykVysledku
n9:eng
n5:klicovaSlova
voltage-step transient; cottrell asymptote; ohmic loss
n5:klicoveSlovo
n8:voltage-step%20transient n8:cottrell%20asymptote n8:ohmic%20loss
n5:kontrolniKodProRIV
[D9A495788A2C]
n5:obor
n14:CI
n5:pocetDomacichTvurcuVysledku
1
n5:pocetTvurcuVysledku
1
n5:projekt
n17:GA104%2F08%2F0428
n5:rokUplatneniVysledku
n7:2010
n5:tvurceVysledku
Wein, Ondřej
n5:zamer
n12:AV0Z40720504