RT info:eu-repo/semantics/article
T1 Effect of chloride and pH on the electrochemical surface oxidation enhanced Raman scattering
A1 Perales Rondon, Juan Víctor
A1 Hernández Muñoz, Sheila
A1 Heras Vidaurre, Aránzazu
A1 Colina Santamaría, Álvaro
K1 Silver
K1 Spectroelectrochemistry
K1 Raman enhancement
K1 Nanostructures
K1 Química analítica
K1 Chemistry, Analytic
AB 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.
PB Elsevier
SN 0169-4332
YR 2019
FD 2019-04
LK http://hdl.handle.net/10259/5335
UL http://hdl.handle.net/10259/5335
LA eng
NO 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)
DS Repositorio Institucional de la Universidad de Burgos
RD 22-dic-2024