Coreactant electrochemiluminescence at nanoporous gold electrodes

The electrochemiluminescence (ECL) performances were comparatively investigated at flat and nanoporous gold (NPG) electrodes of different thicknesses (120 and 200 nm) and roughness factors (fr). The phenomena were studied using either tripropylamine (TPrA) or peroxydisulfate (S2O82−) as sacrificial...

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Published in:Electrochimica acta 2018-07, Vol.277, p.168-175
Main Authors: Villani, Elena, Valenti, Giovanni, Marcaccio, Massimo, Mattarozzi, Luca, Barison, Simona, Garoli, Denis, Cattarin, Sandro, Paolucci, Francesco
Format: Article
Language:English
Subjects:
Corrosion
Dependence
Electrochemiluminescence
Electrodes
Electroluminescence
Gold
Metal surfaces
Morphology
Nanoparticles
Nanoporous gold
Peroxydisulfate
Porous materials
Ruthenium
Surface area
Tripropylamine
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cited_by cdi_FETCH-LOGICAL-c380t-7851cd45dd31c6d9f40bb168cf90503287abf0cb3ea2498937be55138b6a44cd3
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container_title Electrochimica acta
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creator Villani, Elena
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Paolucci, Francesco
description The electrochemiluminescence (ECL) performances were comparatively investigated at flat and nanoporous gold (NPG) electrodes of different thicknesses (120 and 200 nm) and roughness factors (fr). The phenomena were studied using either tripropylamine (TPrA) or peroxydisulfate (S2O82−) as sacrificial coreactant and Ruthenium (II)-tris(2,2′-bipyridine) as emitting species. The experiments performed using TPrA showed, at first glance, a linear dependence of the ECL emission with respect to the effective surface area of the NPG electrodes. However, ECL signals were not stable in the measuring conditions, presumably due to amine absorption on the metal surface, leading to electrode corrosion and modification of the surface morphology. The experiments made using peroxydisulfate as coreactant provided conversely a stable ECL response, about proportional to the effective electrode surface area, in the considered range of thicknesses.
doi_str_mv 10.1016/j.electacta.2018.04.215
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subjects Corrosion
Dependence
Electrochemiluminescence
Electrodes
Electroluminescence
Gold
Metal surfaces
Morphology
Nanoparticles
Nanoporous gold
Peroxydisulfate
Porous materials
Ruthenium
Surface area
Tripropylamine
title Coreactant electrochemiluminescence at nanoporous gold electrodes
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