Passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment
We have described the use of a microelectrode to simulate a passivating reaction taking place at a micro or nanoparticle. Reaction at the microelectrode is considered to lead to either diffusion of the product back into solution or the formation of a surface-bound species. A kinetic parameter descri...
Saved in:
Main Author: | |
---|---|
Other Authors: | |
Format: | Article |
Published: |
2023
|
Subjects: | |
Online Access: | https://repository.li.mahidol.ac.th/handle/123456789/81409 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Mahidol University |
id |
th-mahidol.81409 |
---|---|
record_format |
dspace |
spelling |
th-mahidol.814092023-05-16T14:14:41Z Passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment Shiengjen K. Mahidol University Physics and Astronomy We have described the use of a microelectrode to simulate a passivating reaction taking place at a micro or nanoparticle. Reaction at the microelectrode is considered to lead to either diffusion of the product back into solution or the formation of a surface-bound species. A kinetic parameter describes the balance between the two processes. Linear sweep voltammograms were simulated for the first and second scan under different values of the kinetic parameter. These simulations were used to derive an empirical equation relating the change in peak height to the passivation kinetics. The equation was used to examine the oxidation of NADH, phenol and ascorbic acid at a Pt microelectrode, and the oxidation of phenol at alloy microelectrodes of different Pt:Rh content. 2023-05-16T07:14:41Z 2023-05-16T07:14:41Z 2023-05-01 Article Journal of Solid State Electrochemistry Vol.27 No.5 (2023) , 1241-1247 10.1007/s10008-023-05399-9 14330768 14328488 2-s2.0-85147572925 https://repository.li.mahidol.ac.th/handle/123456789/81409 SCOPUS |
institution |
Mahidol University |
building |
Mahidol University Library |
continent |
Asia |
country |
Thailand Thailand |
content_provider |
Mahidol University Library |
collection |
Mahidol University Institutional Repository |
topic |
Physics and Astronomy |
spellingShingle |
Physics and Astronomy Shiengjen K. Passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment |
description |
We have described the use of a microelectrode to simulate a passivating reaction taking place at a micro or nanoparticle. Reaction at the microelectrode is considered to lead to either diffusion of the product back into solution or the formation of a surface-bound species. A kinetic parameter describes the balance between the two processes. Linear sweep voltammograms were simulated for the first and second scan under different values of the kinetic parameter. These simulations were used to derive an empirical equation relating the change in peak height to the passivation kinetics. The equation was used to examine the oxidation of NADH, phenol and ascorbic acid at a Pt microelectrode, and the oxidation of phenol at alloy microelectrodes of different Pt:Rh content. |
author2 |
Mahidol University |
author_facet |
Mahidol University Shiengjen K. |
format |
Article |
author |
Shiengjen K. |
author_sort |
Shiengjen K. |
title |
Passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment |
title_short |
Passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment |
title_full |
Passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment |
title_fullStr |
Passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment |
title_full_unstemmed |
Passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment |
title_sort |
passivating reactions at a microdisk electrode as a model of passivation at a microparticle: theory and experiment |
publishDate |
2023 |
url |
https://repository.li.mahidol.ac.th/handle/123456789/81409 |
_version_ |
1781414148659216384 |