Determination of standard electrochemical rate constants from semi-circular sweep voltammetry: a combined theoretical and experimental study
Semi-circular potential sweep voltammetry has recently been proposed as a sensitive method to estimate electrochemical rate constants [J. Electroanal. Chem., 835 (2019) 60–66]. Herein, this approach is experimentally verified using microdisc electrode voltammetry. The reduction of hexaami...
| Main Authors: | , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
Elsevier
2020
|
| _version_ | 1797079853356285952 |
|---|---|
| author | Amin, HMA Uchida, Y Kätelhön, E Compton, RG |
| author_facet | Amin, HMA Uchida, Y Kätelhön, E Compton, RG |
| author_sort | Amin, HMA |
| collection | OXFORD |
| description | Semi-circular potential sweep voltammetry has recently been proposed as a sensitive method to estimate electrochemical rate constants [J. Electroanal. Chem., 835 (2019) 60–66]. Herein, this approach is experimentally verified using microdisc electrode voltammetry. The reduction of hexaamineruthenium (III) chloride and the oxidation of ferrocenemethanol, both in aqueous solution, at carbon electrodes were studied. The rate constants obtained from semi-circular voltammetry for both investigated redox systems are in agreement with independent values obtained from the conventional Nicholson method at macroelectrodes. The method compares favourably in terms of simplicity and speed as it requires recording only a single voltammogram. This approach provides a novel, fast complementary method for the evaluation of the standard electrochemical rate constant. |
| first_indexed | 2024-03-07T00:51:45Z |
| format | Journal article |
| id | oxford-uuid:86a2cc2d-c2f6-47ce-9c7b-4106f0f1423b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:51:45Z |
| publishDate | 2020 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:86a2cc2d-c2f6-47ce-9c7b-4106f0f1423b2022-03-26T22:05:18ZDetermination of standard electrochemical rate constants from semi-circular sweep voltammetry: a combined theoretical and experimental studyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:86a2cc2d-c2f6-47ce-9c7b-4106f0f1423bEnglishSymplectic ElementsElsevier2020Amin, HMAUchida, YKätelhön, ECompton, RGSemi-circular potential sweep voltammetry has recently been proposed as a sensitive method to estimate electrochemical rate constants [J. Electroanal. Chem., 835 (2019) 60–66]. Herein, this approach is experimentally verified using microdisc electrode voltammetry. The reduction of hexaamineruthenium (III) chloride and the oxidation of ferrocenemethanol, both in aqueous solution, at carbon electrodes were studied. The rate constants obtained from semi-circular voltammetry for both investigated redox systems are in agreement with independent values obtained from the conventional Nicholson method at macroelectrodes. The method compares favourably in terms of simplicity and speed as it requires recording only a single voltammogram. This approach provides a novel, fast complementary method for the evaluation of the standard electrochemical rate constant. |
| spellingShingle | Amin, HMA Uchida, Y Kätelhön, E Compton, RG Determination of standard electrochemical rate constants from semi-circular sweep voltammetry: a combined theoretical and experimental study |
| title | Determination of standard electrochemical rate constants from semi-circular sweep voltammetry: a combined theoretical and experimental study |
| title_full | Determination of standard electrochemical rate constants from semi-circular sweep voltammetry: a combined theoretical and experimental study |
| title_fullStr | Determination of standard electrochemical rate constants from semi-circular sweep voltammetry: a combined theoretical and experimental study |
| title_full_unstemmed | Determination of standard electrochemical rate constants from semi-circular sweep voltammetry: a combined theoretical and experimental study |
| title_short | Determination of standard electrochemical rate constants from semi-circular sweep voltammetry: a combined theoretical and experimental study |
| title_sort | determination of standard electrochemical rate constants from semi circular sweep voltammetry a combined theoretical and experimental study |
| work_keys_str_mv | AT aminhma determinationofstandardelectrochemicalrateconstantsfromsemicircularsweepvoltammetryacombinedtheoreticalandexperimentalstudy AT uchiday determinationofstandardelectrochemicalrateconstantsfromsemicircularsweepvoltammetryacombinedtheoreticalandexperimentalstudy AT katelhone determinationofstandardelectrochemicalrateconstantsfromsemicircularsweepvoltammetryacombinedtheoreticalandexperimentalstudy AT comptonrg determinationofstandardelectrochemicalrateconstantsfromsemicircularsweepvoltammetryacombinedtheoreticalandexperimentalstudy |