Size and Shape Effects on the Phase Diagrams of Nickel-Based Bimetallic Nanoalloys
Por:
Guisbiers G., Mendoza-Pérez R., Bazán-Díaz L., Mendoza-Cruz R., Velázquez-Salazar J.J., José-Yacamán M.
Publicada:
1 ene 2017
Resumen:
Nickel-based bimetallic nanoalloys (nickel-palladium, nickel-platinum, nickel-rhodium, and nickel-iridium) play an important role in catalysis, electrocatalysis, and magnetic applications. To improve the performance of those materials at the nanoscale, the knowledge of their phase diagrams is critically needed. However, such knowledge is still lacking because calorimetry experiments are extremely challenging to perform at the nanoscale. Then, a smart and necessary alternative to those challenging and time-consuming experiments is to obtain this knowledge from theoretical predictions by using nanothermodynamics. The phase diagrams at the nanoscale for the considered alloys are therefore predicted for various polyhedral shapes, while the nature of the surface segregated element is established by using two segregation rules. Finally, the theoretical results are supported by advanced transmission electron microscopy characterization. © 2017 American Chemical Society.
Filiaciones:
Guisbiers G.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, United States
Mendoza-Pérez R.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, United States
Bazán-Díaz L.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, United States
Mendoza-Cruz R.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, United States
Velázquez-Salazar J.J.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, United States
José-Yacamán M.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, United States
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