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Elsevier, Electrochimica Acta, (131), p. 28-35

DOI: 10.1016/j.electacta.2014.02.002

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Characterization of adsorbates by transient measurements in Scanning Electrochemical Microscopy

Journal article published in 2014 by Dao Trinh, Michel Keddam, Xosé Ramon Novoa, Vincent Vivier ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

In this work, we demonstrate that the use of the scanning electrochemical microscopy in transient mode allows the investigation of adsorbate intermediates at a polarized interface. Two different systems were studied. In the case of a competitive adsorption involving halide and hydrogen, the contribution of each element was monitored independently. Interestingly, the simultaneous measurement of the electrochemical impedance allowed the complex differential capacitance for each adsorbed species to be calculated. In the case of the iron dissolution, the formation of a monovalent Fe species was evidenced allowing to discriminate between different dissolution mechanisms previously described in the literature.