Scanning capillary microscopy/mass spectrometry for mapping spatial electrochemical activity of electrodes

A. D. Modestov, S. Srebnik, O. Lev*, J. Gun

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

A new technique for microscopic imaging of electrochemically active surfaces is introduced. The technique combines concepts of probe microscopy and advances in mass spectrometry. The technique is based on a miniature electrochemical flow cell scanner. A liquid feed stream containing a redox component is introduced to the vicinity of the examined location through the annulus of a coaxial capillary set. The incoming reagent interacts with the target location, and the generated product stream is transferred through the inner capillary to an electrospray mass spectrometer, ESI-MS. Thus, a multicomponent, potential-dependent image of the products' distribution versus the location on the electrode is generated. The use of the technique is demonstrated by scanning the electrochemical heterogeneity of model electrodes.

Original languageAmerican English
Pages (from-to)4229-4240
Number of pages12
JournalAnalytical Chemistry
Volume73
Issue number17
DOIs
StatePublished - 1 Sep 2001

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