2026-05-30T12:59:38Zhttps://riubu.ubu.es/oai/request

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

00925njm 22002777a 4500 dc Perales Rondon, Juan Víctor author Hernández Muñoz, Sheila author Heras Vidaurre, Aránzazu author Colina Santamaría, Álvaro author 2019-04 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. 0169-4332 http://hdl.handle.net/10259/5335 10.1016/j.apsusc.2018.12.148 Silver Spectroelectrochemistry Raman enhancement Nanostructures Effect of chloride and pH on the electrochemical surface oxidation enhanced Raman scattering