Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/1970
Título: Fabrication of Three-Dimensional Dendritic Ni-Co Films By Electrodeposition on Stainless Steel Substrates
Autor: Silva, R. P.
Eugénio, S.
Silva, Maria Teresa Oliveira de Moura e
Carmezim, M. J.
Montemor, M. F.
Palavras-chave: Nickel
Alloys
Powders
Growth
Data: 25-Out-2012
Editora: Amer Chemical Soc
Citação: Silva R P, Eugénio S, Silva T M, Carmezim M J, Montemor M F. Fabrication of Three-Dimensional Dendritic Ni-Co Films By Electrodeposition on Stainless Steel Substrates. Journal of Physical Chemistry C. 2012; 45 (116): 22425-22431.
Resumo: Co-deposition of nickel and cobalt was carried out on austenitic stainless steel (AISI 304) substrates by imposing a square waveform current in the cathodic region. The innovative procedure applied in this work allows creating a stable, fully developed, and open porous three-dimensional (3D) dendritic structure, which can be used as electrode for redox supercapacitors. This study investigates in detail the influence of the applied current density on the morphology, mass, and chemical composition of the deposited Ni-Co films and the resulting 3D porous network dendritic structure. The morphology and the physicochemical composition were studied by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (W). The electrochemical behavior of the materials was evaluated by cyclic voltammetry (CV). The results highlight the mechanism involved in the coelectrodeposition process and how the lower limit current density tailors the film composition and morphology, as well as its electrochemical activity.
Peer review: yes
URI: http://hdl.handle.net/10400.21/1970
ISSN: 1932-7447
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

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