Controlling surface contact, oxygen transport, and pitting of surface oxide via single-channel scanning electrochemical cell microscopy

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DOIResolve DOI: https://doi.org/10.1021/acs.analchem.2c02459
AuthorSearch for: ; Search for: 1; Search for: 1; Search for: ORCID identifier: https://orcid.org/0000-0003-4752-7507
Name affiliation
  1. National Research Council of Canada. Automotive and Surface Transportation
FunderSearch for: National Research Council Canada; Search for: Office of Energy Research and Development; Search for: Centre québécois de recherche et de développement de l'aluminium
FormatText, Article
Subjectalloys; interfaces; liquids; oxides; redox reactions
Abstract
In single-channel scanning electrochemical cell microscopy, the applied potential during the approach of a micropipette to the substrate generates a transient current upon droplet contact with the substrate. Once the transient current exceeds a set threshold, the micropipette is automatically halted. Currently, the effect of the approach potential on the subsequent electrochemical measurements, such as the open-circuit potential and potentiodynamic polarization, is considered to be inconsequential. Herein, we demonstrate that the applied approach potential does impact the extent of probe-to-substrate interaction and subsequent microscale electrochemical measurements on aluminum alloy AA7075-T73.
Publication date
PublisherAmerican Chemical Society
In
  • Analytical Chemistry 94, no. 42 (25 October 2022): 14603–14610.
LanguageEnglish
Peer reviewedYes
NRC numberNRC-AST-2021-2022/041
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Record identifierfe73ca1b-e283-4850-beab-bd11fb3bb190
Record created2022-12-08
Record modified2022-12-08
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