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Artículo

Electrochemical synthesis of Rh-Pd bimetallic nanoparticles onto a glassy carbon surface

Querejeta, Ariana LeilaIcon ; del Barrio, Maria CeciliaIcon ; Garcia, Silvana Graciela
Fecha de publicación: 10/2016
Editorial: Elsevier Science Sa
Revista: Journal of Electroanalytical Chemistry
ISSN: 1572-6657
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Nano-materiales

Resumen

Rh-Pd bimetallic nanoparticles were prepared successfully by sequential electrodeposition on a glassy carbon (GC) substrate using single potentiostatic pulses. The generated particles were characterized by ex-situ atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). Initially, AFM images evidenced hemispherical-shaped Pd crystals distributed preferably over the GC surface defects. Size diversity of the formed deposits indicates a progressive nucleation mechanism with a three-dimensional growth. Subsequent Rh deposition does not introduce significant morphological changes. Voltammetric results suggested that Rh is deposited over Pd nanocrystals forming a core-shell type structure. XPS analysis confirms that Pd and Rh are present on the surface, both as metal and as oxide compounds. The relative amount of Rh greater than that of Pd, corroborates that Rh atoms were preferentially at the surface of the bimetallic particles as a shell over the Pd core. The electrocatalytic effect of the Rh-Pd/CV modified electrode was evaluated qualitatively for the hydrogen evolution reaction.
Palabras clave: Bimetallic Particles , Electrodeposition , Palladium , Rhodium
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/48754
URL: http://www.sciencedirect.com/science/article/pii/S1572665716303812
DOI: http://dx.doi.org/10.1016/j.jelechem.2016.07.035
Colecciones
Articulos(CCT - BAHIA BLANCA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - BAHIA BLANCA
Citación
Querejeta, Ariana Leila; del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Electrochemical synthesis of Rh-Pd bimetallic nanoparticles onto a glassy carbon surface; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 778; 10-2016; 98-102
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