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Atomic Surface Segregation and Structural Characterization of PdPt Bimetallic Nanoparticles

Bimetallic nanoparticles are of interest since they lead to many interesting electrical, chemical, catalytic, and optical properties. They are particularly important in the field of catalysis since they show superior catalytic properties than their monometallic counterparts. The structures of bimeta...

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Autores principales: Rodríguez-Proenza, Carlos A., Palomares-Báez, Juan P., Chávez-Rojo, Marco A., García-Ruiz, Amado F., Azanza-Ricardo, Cristy L., Santoveña-Uribe, Alan, Luna-Bárcenas, Gabriel, Rodríguez-López, José L., Esparza, Rodrigo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6212869/
https://www.ncbi.nlm.nih.gov/pubmed/30279340
http://dx.doi.org/10.3390/ma11101882
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author Rodríguez-Proenza, Carlos A.
Palomares-Báez, Juan P.
Chávez-Rojo, Marco A.
García-Ruiz, Amado F.
Azanza-Ricardo, Cristy L.
Santoveña-Uribe, Alan
Luna-Bárcenas, Gabriel
Rodríguez-López, José L.
Esparza, Rodrigo
author_facet Rodríguez-Proenza, Carlos A.
Palomares-Báez, Juan P.
Chávez-Rojo, Marco A.
García-Ruiz, Amado F.
Azanza-Ricardo, Cristy L.
Santoveña-Uribe, Alan
Luna-Bárcenas, Gabriel
Rodríguez-López, José L.
Esparza, Rodrigo
author_sort Rodríguez-Proenza, Carlos A.
collection PubMed
description Bimetallic nanoparticles are of interest since they lead to many interesting electrical, chemical, catalytic, and optical properties. They are particularly important in the field of catalysis since they show superior catalytic properties than their monometallic counterparts. The structures of bimetallic nanoparticles depend mainly on the synthesis conditions and the miscibility of the two components. In this work, PdPt alloyed-bimetallic nanoparticles (NPs) were synthesized through the polyol method, and characterized using spherical aberration (Cs) corrected scanning transmission electron microscopy (STEM). High-angle annular dark-field (HAADF)-STEM images of bimetallic nanoparticles were obtained. The contrast of images shows that nanoparticles have an alloy structure with an average size of 8.2 nm. Together with the characterization of nanoparticles, a systematic molecular dynamics simulations study focused on the structural stability and atomic surface segregation trends in 923-atom PdPt alloyed-bimetallic NPs was carried out.
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spelling pubmed-62128692018-11-14 Atomic Surface Segregation and Structural Characterization of PdPt Bimetallic Nanoparticles Rodríguez-Proenza, Carlos A. Palomares-Báez, Juan P. Chávez-Rojo, Marco A. García-Ruiz, Amado F. Azanza-Ricardo, Cristy L. Santoveña-Uribe, Alan Luna-Bárcenas, Gabriel Rodríguez-López, José L. Esparza, Rodrigo Materials (Basel) Article Bimetallic nanoparticles are of interest since they lead to many interesting electrical, chemical, catalytic, and optical properties. They are particularly important in the field of catalysis since they show superior catalytic properties than their monometallic counterparts. The structures of bimetallic nanoparticles depend mainly on the synthesis conditions and the miscibility of the two components. In this work, PdPt alloyed-bimetallic nanoparticles (NPs) were synthesized through the polyol method, and characterized using spherical aberration (Cs) corrected scanning transmission electron microscopy (STEM). High-angle annular dark-field (HAADF)-STEM images of bimetallic nanoparticles were obtained. The contrast of images shows that nanoparticles have an alloy structure with an average size of 8.2 nm. Together with the characterization of nanoparticles, a systematic molecular dynamics simulations study focused on the structural stability and atomic surface segregation trends in 923-atom PdPt alloyed-bimetallic NPs was carried out. MDPI 2018-10-02 /pmc/articles/PMC6212869/ /pubmed/30279340 http://dx.doi.org/10.3390/ma11101882 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rodríguez-Proenza, Carlos A.
Palomares-Báez, Juan P.
Chávez-Rojo, Marco A.
García-Ruiz, Amado F.
Azanza-Ricardo, Cristy L.
Santoveña-Uribe, Alan
Luna-Bárcenas, Gabriel
Rodríguez-López, José L.
Esparza, Rodrigo
Atomic Surface Segregation and Structural Characterization of PdPt Bimetallic Nanoparticles
title Atomic Surface Segregation and Structural Characterization of PdPt Bimetallic Nanoparticles
title_full Atomic Surface Segregation and Structural Characterization of PdPt Bimetallic Nanoparticles
title_fullStr Atomic Surface Segregation and Structural Characterization of PdPt Bimetallic Nanoparticles
title_full_unstemmed Atomic Surface Segregation and Structural Characterization of PdPt Bimetallic Nanoparticles
title_short Atomic Surface Segregation and Structural Characterization of PdPt Bimetallic Nanoparticles
title_sort atomic surface segregation and structural characterization of pdpt bimetallic nanoparticles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6212869/
https://www.ncbi.nlm.nih.gov/pubmed/30279340
http://dx.doi.org/10.3390/ma11101882
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