Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles

Khanal, Subarna y Bhattarai, Nabraj y Velázquez Salazar, J. Jesús y Bahena, Daniel y Soldano, German y Ponce, Arturo y Mariscal, Marcelo M. y Mejía Rosales, Sergio y Yacamán, Miguel José (2013) Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles. Nanoscale, 24 (5). pp. 12456-12463. ISSN 2040-3364

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Resumen

We report the synthesis, structural characterization, and atomistic simulations of AgPd–Pt trimetallic (TM) nanoparticles. Two types of structure were synthesized using a relatively facile chemical method: multiply twinned core–shell, and hollow particles. The nanoparticles were small in size, with an average diameter of 11 nm and a narrow distribution, and their characterization by aberration corrected scanning transmission electron microscopy allowed us to probe the structure of the particles at an atomistic level. In some nanoparticles, the formation of a hollow structure was also observed, that facilitates the alloying of Ag and Pt in the shell region and the segregation of Ag atoms on the surface, affecting the catalytic activity and stability. We also investigated the growth mechanism of the nanoparticles using grand canonical Monte Carlo simulations, and we have found that Pt regions grow at overpotentials on the AgPd nanoalloys, forming 3D islands at the early stages of the deposition process. We found very good agreement between the simulated structures and those observed experimentally.

Tipo de elemento: Article
Materias: Q Ciencia > Q Ciencias en General
Q Ciencia > QC Física
Divisiones: Centro de Investigación en Ciencias Físico Matemáticas
Usuario depositante: Dr. Sergio J. Mejia Rosales
Creadores:
CreadorEmailORCID
Khanal, SubarnaNO ESPECIFICADONO ESPECIFICADO
Bhattarai, NabrajNO ESPECIFICADONO ESPECIFICADO
Velázquez Salazar, J. JesúsNO ESPECIFICADONO ESPECIFICADO
Bahena, DanielNO ESPECIFICADONO ESPECIFICADO
Soldano, GermanNO ESPECIFICADONO ESPECIFICADO
Ponce, ArturoNO ESPECIFICADONO ESPECIFICADO
Mariscal, Marcelo M.NO ESPECIFICADONO ESPECIFICADO
Mejía Rosales, SergioNO ESPECIFICADONO ESPECIFICADO
Yacamán, Miguel JoséNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 03 Feb 2016 21:56
Última modificación: 03 Feb 2016 21:56
URI: http://eprints.uanl.mx/id/eprint/8913

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