2026-05-11T22:02:27Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/61252022-11-15T13:30:15Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845
Repositorio Institucional de la Universidad de Burgos
author
Pérez Estébanez, Martín
author
Hernández Muñoz, Sheila
author
Perales Rondon, Juan Víctor
author
Gomez, Elvira
author
Heras Vidaurre, Aránzazu
author
Colina Santamaría, Álvaro
2021-11-08T13:37:04Z
2021-11-08T13:37:04Z
2020-09
0013-4686
http://hdl.handle.net/10259/6125
10.1016/j.electacta.2020.136560
Electrochemical Surface Oxidation Enhanced Raman Scattering (EC-SOERS) is an interesting and promising phenomenon capable of amplifying the Raman signal in a similar way to Surface Enhanced Raman Scattering (SERS), but EC-SOERS takes place during the oxidation of a silver substrate. This phenomenon was originally described for specific electrolytic conditions in which a small amount of chloride in acidic medium was mandatory to obtain a substantial enhancement. Herein, we demonstrate that EC-SOERS can be also observed in presence of KBr, showing a potential-dependent behavior. Moreover, in this work a novel approach to reach chemical selectivity during time resolved Raman spectroelectrochemistry (TR-Raman-SEC) experiments is proposed. This new approach is based on the effect of the electrolytic medium on the structures that are formed on the electrode surface. SEM studies were carried out to study the origin of this selectivity. Although SEM images reveal clear differences between the structures of silver halides formed on the electrode surface during the oxidation of the substrate, the absence of EC-SOERS effect at open circuit potential hinders the identification of the actual structures responsible for the phenomenon.
spa
Spectroelectrochemistry
Raman
SERS
EC-SOERS
Silver roughening
Chemical selectivity in electrochemical surface oxidation enhanced Raman scattering
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/6125/1/Perez-ea_2020.pdf
File
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Perez-ea_2020.pdf