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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/5335

    Título
    Effect of chloride and pH on the electrochemical surface oxidation enhanced Raman scattering
    Autor
    Perales Rondon, Juan VíctorAutoridad UBU Orcid
    Hernández Muñoz, SheilaAutoridad UBU Orcid
    Heras Vidaurre, AránzazuAutoridad UBU Orcid
    Colina Santamaría, ÁlvaroAutoridad UBU Orcid
    Publicado en
    Applied Surface Science. 2019, V. 473, p. 366-372
    Editorial
    Elsevier
    Fecha de publicación
    2019-04
    ISSN
    0169-4332
    DOI
    10.1016/j.apsusc.2018.12.148
    Résumé
    In the present work, electrochemical surface oxidation enhanced Raman scattering (EC-SOERS) was studied using time resolved Raman spectroelectrochemistry. This multiresponse technique allows us to obtain dynamic information about the processes taking place during the electrochemical oxidation of a silver substrate. EC-SOERS is particularly found in specific electrolytic conditions, namely, HClO4 0.1 M + KCl 5·10−3 M, and has a clear dependence on chloride concentration and pH, being the optimum values between 5·10−3 M and 1·10−2 M for chloride and pH = 1. In light of the results of this study, the appearance of the phenomenon is related to the modification of the electrode surface, yielding Ag/AgCl cubes as plasmonic structures, and the stability of such structures at low pH values. The results presented in this work could shed more light into the intricate EC-SOERS phenomenon which can be summarized as the increase of the Raman signal for a Raman probe molecule exclusively during the electrochemical oxidation of silver electrodes.
    Palabras clave
    Silver
    Spectroelectrochemistry
    Raman enhancement
    Nanostructures
    Materia
    Química analítica
    Chemistry, Analytic
    URI
    http://hdl.handle.net/10259/5335
    Versión del editor
    https://doi.org/10.1016/j.apsusc.2018.12.148
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    Perales-ass_2019.pdf
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