Voltammetry of electroactive oil droplets. Part I: Numerical modelling for three mechanistic models using the dual reciprocity finite element method
Diffusion problems encountered for the case of electrochemical conversion of microdroplets of an electroactive oil deposited on an electrode are studied by the dual reciprocity finite element simulation method (DRM). Three plausible mechanistic models are compared. For a microdroplet of electroactiv...
| 主要な著者: | , , , , |
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| フォーマット: | Journal article |
| 言語: | English |
| 出版事項: |
2000
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| _version_ | 1826295700621623296 |
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| author | Qiu, F Ball, J Marken, F Compton, R Fisher, A |
| author_facet | Qiu, F Ball, J Marken, F Compton, R Fisher, A |
| author_sort | Qiu, F |
| collection | OXFORD |
| description | Diffusion problems encountered for the case of electrochemical conversion of microdroplets of an electroactive oil deposited on an electrode are studied by the dual reciprocity finite element simulation method (DRM). Three plausible mechanistic models are compared. For a microdroplet of electroactive material A) the electrochemical reaction commences from the oil-electrode surface interphase; B) there is rapid charge conduction over the droplet surface so that ion insertion occurs from the droplet-aqueous electrolyte interface; C) the electrochemical reaction occurs only at the three phase boundary oil-aqueous electrolyte-electrode. Cyclic voltammograms and potential step transient responses are simulated. The dimensionless peak current and peak separation as a function of dimensionless scan rate are presented and a comparison of the three mechanistic models shows distinctly different behaviors. The normalized transient currents as a function of normalized time are given and compared for the three mechanistic models. The results provide a clear basis for the mechanistic characterization of real systems ill terms of the three models considered. |
| first_indexed | 2024-03-07T04:05:05Z |
| format | Journal article |
| id | oxford-uuid:c5dee266-abcc-49cf-9a67-0fe2cc793bc1 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:05:05Z |
| publishDate | 2000 |
| record_format | dspace |
| spelling | oxford-uuid:c5dee266-abcc-49cf-9a67-0fe2cc793bc12022-03-27T06:34:12ZVoltammetry of electroactive oil droplets. Part I: Numerical modelling for three mechanistic models using the dual reciprocity finite element methodJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c5dee266-abcc-49cf-9a67-0fe2cc793bc1EnglishSymplectic Elements at Oxford2000Qiu, FBall, JMarken, FCompton, RFisher, ADiffusion problems encountered for the case of electrochemical conversion of microdroplets of an electroactive oil deposited on an electrode are studied by the dual reciprocity finite element simulation method (DRM). Three plausible mechanistic models are compared. For a microdroplet of electroactive material A) the electrochemical reaction commences from the oil-electrode surface interphase; B) there is rapid charge conduction over the droplet surface so that ion insertion occurs from the droplet-aqueous electrolyte interface; C) the electrochemical reaction occurs only at the three phase boundary oil-aqueous electrolyte-electrode. Cyclic voltammograms and potential step transient responses are simulated. The dimensionless peak current and peak separation as a function of dimensionless scan rate are presented and a comparison of the three mechanistic models shows distinctly different behaviors. The normalized transient currents as a function of normalized time are given and compared for the three mechanistic models. The results provide a clear basis for the mechanistic characterization of real systems ill terms of the three models considered. |
| spellingShingle | Qiu, F Ball, J Marken, F Compton, R Fisher, A Voltammetry of electroactive oil droplets. Part I: Numerical modelling for three mechanistic models using the dual reciprocity finite element method |
| title | Voltammetry of electroactive oil droplets. Part I: Numerical modelling for three mechanistic models using the dual reciprocity finite element method |
| title_full | Voltammetry of electroactive oil droplets. Part I: Numerical modelling for three mechanistic models using the dual reciprocity finite element method |
| title_fullStr | Voltammetry of electroactive oil droplets. Part I: Numerical modelling for three mechanistic models using the dual reciprocity finite element method |
| title_full_unstemmed | Voltammetry of electroactive oil droplets. Part I: Numerical modelling for three mechanistic models using the dual reciprocity finite element method |
| title_short | Voltammetry of electroactive oil droplets. Part I: Numerical modelling for three mechanistic models using the dual reciprocity finite element method |
| title_sort | voltammetry of electroactive oil droplets part i numerical modelling for three mechanistic models using the dual reciprocity finite element method |
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