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Title: Monodisperse Pt{sub 3}Co nanoparticles as electrocatalyst : the effects of particle size and pretretment on electrocatalytic reduction of oxygen.

Abstract

Monodisperse Pt{sub 3}Co nanoparticles have been synthesized with size control via an organic solvothermal approach. The obtained nanoparticles were incorporated into a carbon matrix and applied as electrocatalysts for the oxygen reduction reaction to investigate the effects of particle size and pretreatment on their catalytic performance. It has been found that the optimal conditions for maximum mass activity were with particles of {approx}4.5 nm and a mild annealing temperature of about 500 C. While the particle size effect can be correlated to the average surface coordination number, Monte Carlo simulations have been introduced to depict the nanoparticle structure and segregation profile, which revealed that the annealing temperature has a direct influence on the particle surface relaxation, segregation and adsorption/catalytic properties. The obtained fundamental understanding of activity enhancement in Pt-bimetallic alloy catalysts could be utilized to guide the development of advanced nanomaterials for catalytic applications.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
993393
Report Number(s):
ANL/MSD/JA-67899
Journal ID: 1463-9076; TRN: US201023%%325
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Phys. Chem. Chem. Phys.
Additional Journal Information:
Journal Volume: 13; Journal Issue: 26 ; Jul. 14, 2010
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALLOYS; ANNEALING; CARBON; CATALYSTS; COORDINATION NUMBER; ELECTROCATALYSTS; OXYGEN; PARTICLE SIZE; PERFORMANCE; RELAXATION; SEGREGATION

Citation Formats

Wang, C, Wang, G, van der Vliet, D, Chang, K -C, Markovic, N M, Stamenkovic, V R, Materials Science Division, and Indiana Univ.-Purdue Univ. Monodisperse Pt{sub 3}Co nanoparticles as electrocatalyst : the effects of particle size and pretretment on electrocatalytic reduction of oxygen.. United States: N. p., 2010. Web. doi:10.1039/c000822b.
Wang, C, Wang, G, van der Vliet, D, Chang, K -C, Markovic, N M, Stamenkovic, V R, Materials Science Division, & Indiana Univ.-Purdue Univ. Monodisperse Pt{sub 3}Co nanoparticles as electrocatalyst : the effects of particle size and pretretment on electrocatalytic reduction of oxygen.. United States. https://doi.org/10.1039/c000822b
Wang, C, Wang, G, van der Vliet, D, Chang, K -C, Markovic, N M, Stamenkovic, V R, Materials Science Division, and Indiana Univ.-Purdue Univ. 2010. "Monodisperse Pt{sub 3}Co nanoparticles as electrocatalyst : the effects of particle size and pretretment on electrocatalytic reduction of oxygen.". United States. https://doi.org/10.1039/c000822b.
@article{osti_993393,
title = {Monodisperse Pt{sub 3}Co nanoparticles as electrocatalyst : the effects of particle size and pretretment on electrocatalytic reduction of oxygen.},
author = {Wang, C and Wang, G and van der Vliet, D and Chang, K -C and Markovic, N M and Stamenkovic, V R and Materials Science Division and Indiana Univ.-Purdue Univ.},
abstractNote = {Monodisperse Pt{sub 3}Co nanoparticles have been synthesized with size control via an organic solvothermal approach. The obtained nanoparticles were incorporated into a carbon matrix and applied as electrocatalysts for the oxygen reduction reaction to investigate the effects of particle size and pretreatment on their catalytic performance. It has been found that the optimal conditions for maximum mass activity were with particles of {approx}4.5 nm and a mild annealing temperature of about 500 C. While the particle size effect can be correlated to the average surface coordination number, Monte Carlo simulations have been introduced to depict the nanoparticle structure and segregation profile, which revealed that the annealing temperature has a direct influence on the particle surface relaxation, segregation and adsorption/catalytic properties. The obtained fundamental understanding of activity enhancement in Pt-bimetallic alloy catalysts could be utilized to guide the development of advanced nanomaterials for catalytic applications.},
doi = {10.1039/c000822b},
url = {https://www.osti.gov/biblio/993393}, journal = {Phys. Chem. Chem. Phys.},
number = 26 ; Jul. 14, 2010,
volume = 13,
place = {United States},
year = {Wed Jul 14 00:00:00 EDT 2010},
month = {Wed Jul 14 00:00:00 EDT 2010}
}