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Artículo

Novel PdAgCu ternary alloy as promising materials for hydrogen separation membranes: Synthesis and characterization

Tarditi, Ana MariaIcon ; Cornaglia, Laura MariaIcon
Fecha de publicación: 01/2011
Editorial: Elsevier Science
Revista: Surface Science
ISSN: 0039-6028
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Recubrimientos y Películas

Resumen

The use of the sequential electroless plating method allowed us to obtain the PdAgCu ternary alloy on top of dense stainless steel (SS) 316 L disks. The XRD analysis indicated that initially the nucleation of the two phases of the alloy (FCC and BCC) takes place, but the FCC/BCC ratio increases with the annealing time at 500 °C in H2 stream. After 162 h, the film contained only the FCC phase, which presents promising properties to be applied in the synthesis of hydrogen selective membranes. SEM cross-section results showed that a dense, continuous, defect-free film was deposited on top of the SS support, and the EDS data indicated that no significant gradient was present on the thickness of the film. XPS and LEIS allowed us to determine that Cu and Ag surface segregation takes place after annealing up to 500 °C/5 days. In the top-most surface layer, Ag enrichment takes place as determined by ARXPS experiments which can be the result of the lower surface tension of Ag compared to that of Cu and Pd. Increasing the annealing temperature results in an increase of the Ag surface segregation while the Cu concentration in the top-most surface layer decreases.
Palabras clave: Hydrogen Separation Membrane , Palladium Based Ternary Alloys , Surface Segregation
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/54016
DOI: http://dx.doi.org/10.1016/j.susc.2010.10.001
URL: https://www.sciencedirect.com/science/article/pii/S0039602810003985
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Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Tarditi, Ana Maria; Cornaglia, Laura Maria; Novel PdAgCu ternary alloy as promising materials for hydrogen separation membranes: Synthesis and characterization; Elsevier Science; Surface Science; 605; 1-2; 1-2011; 62-71
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