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Precursor Investigation in the Synthesis of PtPb Nanocatalysts

Published online by Cambridge University Press:  25 January 2013

Nathan Porter ,
Hong Wu ,
Minji Kong ,
Kai Sun ,
Amar Kumbhar  and
Jiye Fang
Nathan Porter
Affiliation:
Department of Chemistry and Materials Science & Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
Hong Wu
Affiliation:
Department of Chemistry and Materials Science & Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
Minji Kong
Affiliation:
Department of Chemistry and Materials Science & Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
Kai Sun
Affiliation:
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
Amar Kumbhar
Affiliation:
Chapel Hill Analytical and Nanofabrication Laboratory, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
Jiye Fang*
Affiliation:
Department of Chemistry and Materials Science & Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
*
*Email: jfang@binghamton.edu
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Abstract

In recent years, platinum-based single crystalline nanoalloys as nanoscale catalysts, such as Pt-M (M = Ni, Co, Fe..etc.), have exhibited improved catalytic performance due to the increase in the surface-to-volume ratio. Some Pt-M nanopolyhedra such as nanocubes and nano-octahedra have been reported with enhanced activity when being used as electrocatalysts. In order to further establish a correlation between the exposed nanocrystal facets (shapes) and their corresponding activities, a pursuit of shape-controlled nanocatalyst synthesis is essential. Although PtPb nanoalloys have been prepared using solution-based methods, few studies have highlighted their catalytic activity as a function of the nanocrystal shape. This work focuses on a modified polyol synthesis technique and an adjustment of the Pb-metal precursor, which serves as a “buffer” in the nucleation stage of the shape-controlled nanoalloy development. Using this developed synthetic strategy, shape-controlled hexagonally close-packed PtPb nanoalloys can be prepared in a one-pot synthesis without additional post-treatment. The as-prepared PtPb nanocrystals demonstrate an improved anode electrocatalytic performance.

Keywords

chemical synthesiscrystallographic structurecatalytic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1491: Symposium C – Electrocatalysis and Interfacial Electrochemistry for Energy Conversion and Storage , 2013 , mrsf12-1491-c07-09
Copyright
Copyright © Materials Research Society 2013

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