Journal article
Imaging electrode heterogeneity using chemically confined fluorescence electrochemical microscopy
- Abstract:
- By varying the total and the relative concentrations of a strong acid (HClO4) and a pH-sensitive fluorescent dye (8-hydroxypyrene-1,3,6-trisulfonate), this work demonstrates that both the hydrogen evolution reaction or the oxygen reduction reaction can be selectively and optically studied at an electrochemical interface. The local pH shift driven by the redox reaction can be visualized through fluorescence imaging of the interface. The use of finite strong acid concentrations further serves to constrain the pH change to a thin layer adjacent to the surface. This chemical confinement of the fluorophore improves the system’s resolution and enables micrometer scale heterogeneity on the electrode surface to be readily visualized.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 685.8KB, Terms of use)
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- Publisher copy:
- 10.1021/acs.jpclett.7b02925
Authors
- Publisher:
- American Chemical Society
- Journal:
- Journal of Physical Chemistry Letters More from this journal
- Volume:
- 8
- Pages:
- 6124–6127
- Publication date:
- 2017-12-06
- Acceptance date:
- 2017-12-06
- DOI:
- ISSN:
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1948-7185
- Pubs id:
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pubs:810413
- UUID:
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uuid:00809ca9-74a0-46be-9e3a-72cebb86cdb0
- Local pid:
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pubs:810413
- Source identifiers:
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810413
- Deposit date:
-
2017-12-12
Terms of use
- Copyright holder:
- American Chemical Society
- Copyright date:
- 2017
- Notes:
- Copyright © 2017 American Chemical Society. This is the accepted manuscript version of the article. The final version is available online from American Chemical Society at: https://doi.org/10.1021/acs.jpclett.7b02925
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