2024-03-29T10:54:56Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/42652021-11-10T09:38:17Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845
UV/Vis spectroelectrochemistry as a tool for monitoring the fabrication of sensors based on silver nanoparticle modified electrodes
Fernández Blanco, Ana Cristina
Colina, Álvaro
Heras, Aránzazu
UV-Vis spectroelectrochemistry
silver nanoparticles
screen-printed electrodes
electrochemistry
Química analítica
Chemistry, Analytic
A new controlled current multipulse methodology has been developed to modify the screen-printed electrode surface with silver nanoparticles (AgNPs). Spectroelectrochemistry has provided not only information about the type of nanoparticles (NPs) deposited on the electrode surface, but also about the electrosynthesis process. Small NPs without plasmon band are initially generated. Next, these nuclei grow to form bigger NPs in the reduction pulses with a characteristic plasmon band centered at 400 nm. Most of the NPs are generated during the first reduction pulses and a linear growth of the absorbance at a lower reaction rate was obtained in the subsequent pulses. Oxidation pulses do not redissolve completely silver NPs but only partially, meaning that very stable NPs are generated. AgNPs-modified electrodes have been successfully used to determine hydrogen peroxide. Spectroelectrochemistry has also yielded very useful information to understand the voltammetric signal obtained during the reduction of H2O2 on silver modified electrodes.
Ministerio de Economía y Competitividad (CTQ2010-17127) and Junta de Castilla y León (GR71, BU197A12-2)
2016-11-11T09:02:21Z
2016-11-11T09:02:21Z
2013-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
1424-8220
http://hdl.handle.net/10259/4265
10.3390/s130505700
eng
Sensors. 2013, V. 13, n. 5, p. 5700-5711
http://dx.doi.org/10.3390/s130505700
info:eu-repo/grantAgreement/MINECO/CTQ2010-17127
info:eu-repo/grantAgreement/JCyL/GR71
info:eu-repo/grantAgreement/JCyL/BU197A12-2
Attribution 3.0 Unported
http://creativecommons.org/licenses/by/3.0/
info:eu-repo/semantics/openAccess
application/pdf
MDPI