2024-03-29T00:33:17Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/53352022-04-07T13:12:12Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845
Effect of chloride and pH on the electrochemical surface oxidation enhanced Raman scattering
Perales Rondon, Juan Víctor
Hernández Muñoz, Sheila
Heras Vidaurre, Aránzazu
Colina Santamaría, Álvaro
Silver
Spectroelectrochemistry
Raman enhancement
Nanostructures
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.
2020-06-10
2020-06-10
2019-04
info:eu-repo/semantics/article
0169-4332
http://hdl.handle.net/10259/5335
10.1016/j.apsusc.2018.12.148
eng
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
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier