Artículo
Electrochemical area of graphene-supported metal nanoparticles from an atomistic approach
Jiménez García, Juan Carlos
; Olmos Asar, Jimena Anahí
; Franceschini, Esteban Andrés
; Mariscal, Marcelo
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Fecha de publicación:
04/2020
Editorial:
Springer
Revista:
Journal of Applied Electrochemistry
ISSN:
0021-891X
e-ISSN:
1572-8838
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In electrochemical catalysis, parameters such as current, resistance, or capacitance must be referred to the electrochemically exposed area, otherwise they lack physical sense. For this reason it is necessary to know this exposed area as accurately as possible. Although there are several experimental methods to estimate the electrochemically exposed area, these are usually not suitable for different metals and present large errors in measurements, for example when two or more metals are mixed. Moreover, the technical difficulties of carrying out this type of measure mean that it is often necessary to resort to approximations with great error, such as the spherical approach, with the aim of having an approximate value of the area. In this work, Molecular Dynamics simulations were performed to study the morphology of graphene-supported nanoparticles. A method for the calculation of the electrochemically active surface area is proposed and tested for Pt, Au, and Pt/Au nanoalloys. These results are compared with existent experimental data and a model is proposed for the calculation of the electrochemically active area for supported nanoparticles of different sizes.
Palabras clave:
CATALYSIS
,
ELECTROCHEMICAL AREA
,
GRAPHENE
,
MOLECULAR DYNAMICS
,
PEMFC
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Licencia
Identificadores
Colecciones
Articulos(INFIQC)
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Citación
Jiménez García, Juan Carlos; Olmos Asar, Jimena Anahí; Franceschini, Esteban Andrés; Mariscal, Marcelo; Electrochemical area of graphene-supported metal nanoparticles from an atomistic approach; Springer; Journal of Applied Electrochemistry; 50; 4; 4-2020; 421-429
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