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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/6125

    Título
    Chemical selectivity in electrochemical surface oxidation enhanced Raman scattering
    Autor
    Pérez Estébanez, MartínUBU authority Orcid
    Hernández Muñoz, SheilaUBU authority Orcid
    Perales Rondon, Juan VíctorUBU authority Orcid
    Gomez, Elvira
    Heras Vidaurre, AránzazuUBU authority Orcid
    Colina Santamaría, ÁlvaroUBU authority Orcid
    Publicado en
    Electrochimica Acta. 2020, V. 353, 136560
    Editorial
    Elsevier
    Fecha de publicación
    2020-09
    ISSN
    0013-4686
    DOI
    10.1016/j.electacta.2020.136560
    Abstract
    Electrochemical Surface Oxidation Enhanced Raman Scattering (EC-SOERS) is an interesting and promising phenomenon capable of amplifying the Raman signal in a similar way to Surface Enhanced Raman Scattering (SERS), but EC-SOERS takes place during the oxidation of a silver substrate. This phenomenon was originally described for specific electrolytic conditions in which a small amount of chloride in acidic medium was mandatory to obtain a substantial enhancement. Herein, we demonstrate that EC-SOERS can be also observed in presence of KBr, showing a potential-dependent behavior. Moreover, in this work a novel approach to reach chemical selectivity during time resolved Raman spectroelectrochemistry (TR-Raman-SEC) experiments is proposed. This new approach is based on the effect of the electrolytic medium on the structures that are formed on the electrode surface. SEM studies were carried out to study the origin of this selectivity. Although SEM images reveal clear differences between the structures of silver halides formed on the electrode surface during the oxidation of the substrate, the absence of EC-SOERS effect at open circuit potential hinders the identification of the actual structures responsible for the phenomenon.
    Palabras clave
    Spectroelectrochemistry
    Raman
    SERS
    EC-SOERS
    Silver roughening
    Materia
    Química analítica
    Chemistry, Analytic
    URI
    http://hdl.handle.net/10259/6125
    Versión del editor
    https://doi.org/10.1016/j.electacta.2020.136560
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