2026-05-30T12:49:39Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/53352022-04-07T13:12:12Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845

Perales Rondon, Juan Víctor Hernández Muñoz, Sheila Heras Vidaurre, Aránzazu Colina Santamaría, Álvaro 2020-06-10T09:35:10Z 2020-06-10T09:35:10Z 2019-04 0169-4332 http://hdl.handle.net/10259/5335 10.1016/j.apsusc.2018.12.148 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. Ministerio de Economía y Competitividad (Grants CTQ2017-83935-R-AEI/FEDERUE) and Junta de Castilla y León (Grant BU033-U16). J.V.P-R. thanks JCyL for his postdoctoral fellowship (Grant BU033-U16) application/pdf eng Elsevier Applied Surface Science. 2019, V. 473, p. 366-372 https://doi.org/10.1016/j.apsusc.2018.12.148 info:eu-repo/grantAgreement/MINECO/CTQ2017-83935-R Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Silver Spectroelectrochemistry Raman enhancement Nanostructures Química analítica Chemistry, Analytic Effect of chloride and pH on the electrochemical surface oxidation enhanced Raman scattering info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Applied Surface Science 473 366 372