RT info:eu-repo/semantics/article
T1 UV/Vis spectroelectrochemistry as a tool for monitoring the fabrication of sensors based on silver nanoparticle modified electrodes
A1 Fernández Blanco, Ana Cristina
A1 Colina Santamaría, Álvaro
A1 Heras Vidaurre, Aránzazu
K1 UV-Vis spectroelectrochemistry
K1 silver nanoparticles
K1 screen-printed electrodes
K1 electrochemistry
K1 Química analítica
K1 Chemistry, Analytic
AB 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.
PB MDPI
SN 1424-8220
YR 2013
FD 2013-05
LK http://hdl.handle.net/10259/4265
UL http://hdl.handle.net/10259/4265
LA eng
NO Ministerio de Economía y Competitividad (CTQ2010-17127) and Junta de Castilla y León (GR71, BU197A12-2)
DS Repositorio Institucional de la Universidad de Burgos
RD 04-dic-2024