| Télécharger | - Sera disponible ici le 25 octobre 2023
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| DOI | Trouver le DOI : https://doi.org/10.1021/acs.analchem.2c02681 |
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| Auteur | Rechercher : Leslie, Nathaniel; Rechercher : Mena-Morcillo, EmmanuelIdentifiant ORCID : https://orcid.org/0000-0002-3193-0003; Rechercher : Morel, Alban1; Rechercher : Mauzeroll, JanineIdentifiant ORCID : https://orcid.org/0000-0003-4752-7507 |
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| Affiliation du nom | - Conseil national de recherches du Canada. Automobile et les transports de surface
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| Bailleur de fonds | Rechercher : National Research Council of Canada; Rechercher : Office of Energy Research and Development; Rechercher : Natural Sciences and Engineering Research Council of Canada |
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| Format | Texte, Article |
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| Sujet | algorithms; electrodes; kinetic parameters; kinetics; surface reaction kinetics |
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| Résumé | Scanning electrochemical microscopy (SECM) is a powerful technique for imaging the electrochemical reactivity of a surface. Unfortunately, SECM images are mainly used qualitatively. Kinetics of reactions at the surface are almost exclusively obtained from the microelectrode current as it approaches the surface, called an approach curve. The approach curve method is excellent when the reaction at the surface has the same kinetics everywhere, but was not designed to fit the kinetics of finite-sized reactive features. We propose a method for extracting kinetics, feature area, and microelectrode tip-to-substrate distance from SECM images by fitting with simulated images of reactive discs using the Levenberg–Marquardt algorithm. The area of experimental reactive features can be fit to within 10% if the underlying feature is roughly disc-shaped. When the reaction at simulated reactive features is activation-limited, the rate constant can be fit to within 15% of the true value. This work heralds the beginning of quantifying kinetics from SECM images. |
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| Date de publication | 2022-10-25 |
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| Maison d’édition | American Chemical Society |
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| Dans | |
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| Langue | anglais |
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| Sous presse | Oui |
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| Publications évaluées par des pairs | Oui |
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| Numéro du CNRC | NRC-AST-2022-2023/017 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 2363a883-014c-46cf-8a78-75988f346aec |
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| Enregistrement créé | 2022-11-03 |
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| Enregistrement modifié | 2023-03-16 |
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