RT info:eu-repo/semantics/article
T1 Chemical selectivity in electrochemical surface oxidation enhanced Raman scattering
A1 Pérez Estébanez, Martín
A1 Hernández Muñoz, Sheila
A1 Perales Rondon, Juan Víctor
A1 Gomez, Elvira
A1 Heras Vidaurre, Aránzazu
A1 Colina Santamaría, Álvaro
K1 Spectroelectrochemistry
K1 Raman
K1 SERS
K1 EC-SOERS
K1 Silver roughening
K1 Química analítica
K1 Chemistry, Analytic
AB 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.
PB Elsevier
SN 0013-4686
YR 2020
FD 2020-09
LK http://hdl.handle.net/10259/6125
UL http://hdl.handle.net/10259/6125
LA spa
NO Ministerio de Economía y Competitividad (Grants CTQ2017-83935-R-AEI/FEDERUE), Junta de Castilla y León (BU297P18) and Ministerio de Ciencia, Innovación y Universidades (RED2018-102412-T)
DS Repositorio Institucional de la Universidad de Burgos
RD 04-dic-2024