Quantitative Analysis of Cyclic Voltammetry of Redox Monolayers Adsorbed on Semiconductors: Isolating Electrode Kinetics, Lateral Interactions, and Diode Currents
© 2019 American Chemical Society. The design of devices whose functions span from sensing their environments to converting light into electricity or guiding chemical reactivity at surfaces often hinges around a correct and complete understanding of the factors at play when charges are transferre...
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| Format: | Journal Article |
| Language: | English |
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AMER CHEMICAL SOC
2019
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| Online Access: | http://purl.org/au-research/grants/arc/DP190100735 http://hdl.handle.net/20.500.11937/79496 |
| _version_ | 1848764060706799616 |
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| author | Vogel, Yan Molina, A. Gonzalez, J. Ciampi, Simone |
| author_facet | Vogel, Yan Molina, A. Gonzalez, J. Ciampi, Simone |
| author_sort | Vogel, Yan |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2019 American Chemical Society.
The design of devices whose functions span from sensing their environments to converting light into electricity or guiding chemical reactivity at surfaces often hinges around a correct and complete understanding of the factors at play when charges are transferred across an electrified solid-liquid interface. For semiconductor electrodes in particular, published values for charge-transfer kinetic constants are scattered. Furthermore, received wisdom suggests slower charge-transfer kinetics for semiconductors than for metal electrodes. We have used cyclic voltammetry of ferrocene-modified silicon photoanodes and photocathodes as the experimental model system and described a systematic analysis to separate charge-transfer kinetics from diode effects and interactions between adsorbed species. Our results suggest that literature values of charge-transfer kinetic constants at semiconductor electrodes are likely to be underestimates of their actual values. This is revealed by experiments and analytical models showing that the description of the potential distribution across the semiconductor-monolayer-electrolyte interface has been largely oversimplified. |
| first_indexed | 2025-11-14T11:13:21Z |
| format | Journal Article |
| id | curtin-20.500.11937-79496 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:13:21Z |
| publishDate | 2019 |
| publisher | AMER CHEMICAL SOC |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-794962020-08-06T06:36:37Z Quantitative Analysis of Cyclic Voltammetry of Redox Monolayers Adsorbed on Semiconductors: Isolating Electrode Kinetics, Lateral Interactions, and Diode Currents Vogel, Yan Molina, A. Gonzalez, J. Ciampi, Simone Science & Technology Physical Sciences Chemistry, Analytical Chemistry SILICON SURFACE CHARGE © 2019 American Chemical Society. The design of devices whose functions span from sensing their environments to converting light into electricity or guiding chemical reactivity at surfaces often hinges around a correct and complete understanding of the factors at play when charges are transferred across an electrified solid-liquid interface. For semiconductor electrodes in particular, published values for charge-transfer kinetic constants are scattered. Furthermore, received wisdom suggests slower charge-transfer kinetics for semiconductors than for metal electrodes. We have used cyclic voltammetry of ferrocene-modified silicon photoanodes and photocathodes as the experimental model system and described a systematic analysis to separate charge-transfer kinetics from diode effects and interactions between adsorbed species. Our results suggest that literature values of charge-transfer kinetic constants at semiconductor electrodes are likely to be underestimates of their actual values. This is revealed by experiments and analytical models showing that the description of the potential distribution across the semiconductor-monolayer-electrolyte interface has been largely oversimplified. 2019 Journal Article http://hdl.handle.net/20.500.11937/79496 10.1021/acs.analchem.9b00336 English http://purl.org/au-research/grants/arc/DP190100735 AMER CHEMICAL SOC fulltext |
| spellingShingle | Science & Technology Physical Sciences Chemistry, Analytical Chemistry SILICON SURFACE CHARGE Vogel, Yan Molina, A. Gonzalez, J. Ciampi, Simone Quantitative Analysis of Cyclic Voltammetry of Redox Monolayers Adsorbed on Semiconductors: Isolating Electrode Kinetics, Lateral Interactions, and Diode Currents |
| title | Quantitative Analysis of Cyclic Voltammetry of Redox Monolayers Adsorbed on Semiconductors: Isolating Electrode Kinetics, Lateral Interactions, and Diode Currents |
| title_full | Quantitative Analysis of Cyclic Voltammetry of Redox Monolayers Adsorbed on Semiconductors: Isolating Electrode Kinetics, Lateral Interactions, and Diode Currents |
| title_fullStr | Quantitative Analysis of Cyclic Voltammetry of Redox Monolayers Adsorbed on Semiconductors: Isolating Electrode Kinetics, Lateral Interactions, and Diode Currents |
| title_full_unstemmed | Quantitative Analysis of Cyclic Voltammetry of Redox Monolayers Adsorbed on Semiconductors: Isolating Electrode Kinetics, Lateral Interactions, and Diode Currents |
| title_short | Quantitative Analysis of Cyclic Voltammetry of Redox Monolayers Adsorbed on Semiconductors: Isolating Electrode Kinetics, Lateral Interactions, and Diode Currents |
| title_sort | quantitative analysis of cyclic voltammetry of redox monolayers adsorbed on semiconductors: isolating electrode kinetics, lateral interactions, and diode currents |
| topic | Science & Technology Physical Sciences Chemistry, Analytical Chemistry SILICON SURFACE CHARGE |
| url | http://purl.org/au-research/grants/arc/DP190100735 http://hdl.handle.net/20.500.11937/79496 |