Chemical Stability of Mesoporous Oxide Thin Film Electrodes under Electrochemical Cycling: from Dissolution to Stabilization

Mesoporous oxide thin films (MOTF) present very high surface areas and highly controlled monodisperse pores in the nanometer range. These features spurred their possible applications in separation membranes and permselective electrodes. However, their performance in real applications is limited by t...

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Detalles Bibliográficos
Autores principales: Alberti, Sebastián, Steinberg, Paula Y., Giménez, Gustavo, Amenitsch, Heinz, Ybarra, Gabriel, Azzaroni, Omar, Angelomé, Paula C., Soler-Illia, Galo J. A. A.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Exactas
Química
Mesoporous oxide thin films (MOTF)
stability
ionic strength
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123753
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123753
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Mesoporous oxide thin films (MOTF)
stability
ionic strength
spellingShingle Ciencias Exactas
Química
Mesoporous oxide thin films (MOTF)
stability
ionic strength
Alberti, Sebastián
Steinberg, Paula Y.
Giménez, Gustavo
Amenitsch, Heinz
Ybarra, Gabriel
Azzaroni, Omar
Angelomé, Paula C.
Soler-Illia, Galo J. A. A.
Chemical Stability of Mesoporous Oxide Thin Film Electrodes under Electrochemical Cycling: from Dissolution to Stabilization
topic_facet Ciencias Exactas
Química
Mesoporous oxide thin films (MOTF)
stability
ionic strength
description Mesoporous oxide thin films (MOTF) present very high surface areas and highly controlled monodisperse pores in the nanometer range. These features spurred their possible applications in separation membranes and permselective electrodes. However, their performance in real applications is limited by their reactivity. Here, we perform a basic study of the stability of MOTF toward dissolution in aqueous media using a variety of characterization techniques. In particular, we focus in their stability behavior under the influence of ionic strength, adsorption of electrochemical probes, and applied electrode potential. Mesoporous silica thin films present a limited chemical stability after electrochemical cycling, particularly under high ionic strength, due to their high specific surface area and the interactions between the electrochemical probes and the surface. In contrast, TiO₂ or Si<sub>0.9</sub>Zr<sub>0.1</sub>O₂ matrices present higher stability; thus, they are an adequate alternative to produce accessible, sensitive, and robust permselective electrodes or membranes that perform under a wide variety of conditions.
format Articulo
Articulo
author Alberti, Sebastián
Steinberg, Paula Y.
Giménez, Gustavo
Amenitsch, Heinz
Ybarra, Gabriel
Azzaroni, Omar
Angelomé, Paula C.
Soler-Illia, Galo J. A. A.
author_facet Alberti, Sebastián
Steinberg, Paula Y.
Giménez, Gustavo
Amenitsch, Heinz
Ybarra, Gabriel
Azzaroni, Omar
Angelomé, Paula C.
Soler-Illia, Galo J. A. A.
author_sort Alberti, Sebastián
title Chemical Stability of Mesoporous Oxide Thin Film Electrodes under Electrochemical Cycling: from Dissolution to Stabilization
title_short Chemical Stability of Mesoporous Oxide Thin Film Electrodes under Electrochemical Cycling: from Dissolution to Stabilization
title_full Chemical Stability of Mesoporous Oxide Thin Film Electrodes under Electrochemical Cycling: from Dissolution to Stabilization
title_fullStr Chemical Stability of Mesoporous Oxide Thin Film Electrodes under Electrochemical Cycling: from Dissolution to Stabilization
title_full_unstemmed Chemical Stability of Mesoporous Oxide Thin Film Electrodes under Electrochemical Cycling: from Dissolution to Stabilization
title_sort chemical stability of mesoporous oxide thin film electrodes under electrochemical cycling: from dissolution to stabilization
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/123753
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bdutipo_str Repositorios
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