Producción Científica Profesorado

A kinetic and AFM study of the Electrodeposition of Palladium Nanoclusters onto Highly Oriented Pyrolitic Graphite (HOPG).



Mendoza Huizar, Luis Humberto

2015

A kinetic and AFM study of the Electrodeposition of Palladium Nanoclusters onto Highly Oriented Pyrolitic Graphite (HOPG). L. H. Mendoza-Huizar, D. Garrido-Marquez, C.H. Rios-Reyes, M. Rivera, E. García-Sánchez, C. Galán-Vidal. Journal Cluster Science. 26, pp 337-346, 2015. DOI: 10.1007/s10876-014-0837-7Print ISSN 1040-7278, Online ISSN 1572-8862


Abstract


In the present work we have carried out a kinetic and morphological study of the palladium electrodeposition onto highly oriented pyrolitic graphite electrode from an aqueous solution [0.001 M PdCl2 + 1 M NH4Cl (pH 7)]. From the potentiostatic study were calculated the diffusion coefficient (3.2 × 10?6 cm2 s?1), the number of active nucleation sites (N 0), the nucleation rate (A) and the rate constant of the proton reduction process (k PR). A, N 0 and k PR values were potential dependent and they increased with an augment in the applied overpotential. At higher overpotential, it is possible to induce the formation of small Pd clusters with 5 nm in height and an average size of 20?30 nm in diameter.



Producto de Investigación




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