Cited by 152Catalytic Processes in Materials ScienceNanomaterials for catalytic reactionsChemical and Physical Properties of Materials

A Surfactant-Free Strategy for Synthesizing and Processing Intermetallic Platinum-Based Nanoparticle Catalysts

Chen, Hao, Wang, Deli, Yu, Yingchao, Newton, Kathryn A., Muller, David A., Abruña, Héctor, DiSalvo, Francis J.·2012·Journal of the American Chemical Society

Abstract

Using Pt(3)Fe nanoparticles as an example, a surfactant-free Np-KCl matrix method (Np stands for nanoparticle) is developed for the synthesis of nanoparticles with controlled size and structure. In this method, the Np-KCl assembly is formed in a one-pot reduction in THF at room temperature. KCl is an insoluble byproduct of the reaction and serves as a matrix that traps the nanoparticles to avoid particle agglomeration and to control the coalescence of nanoparticles during thermal annealing up to 600 °C. By varying the molar ratio of metal precursors and KCl, as well as the time and temperature of annealing, the final particle sizes and crystalline order can be independently controlled. After thermal processing, nanoparticles were released from the KCl matrix and transferred in an ethylene glycol-water solution to support materials forming a uniform Np-support assembly. A detailed study of the synthesis of ordered intermetallic Pt(3)Fe nanoparticles with an average diameter of 4 nm, using this Np-KCl method, is provided as an example of a generally applicable method. This surfactant-free strategy has been extended to the synthesis of other bi- and trimetallic nanoparticles of Pt-transition metals.

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Crossref · 10.1021/ja308674b

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Authors
Chen, H., Wang, D., Yu, Y., Newton, K. A., Muller, D. A., Abruña, H., & DiSalvo, F. J.
Affiliations
Cornell University (US)
Corresponding author
DiSalvo, Francis J.
Venue
Journal of the American Chemical Society
Published
2012-10-24
Volume
134
Issue
44
Pages
18453-18459
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2128915096
Cited by
152
References
48
Citations by year
2026: 7 · 2025: 14 · 2024: 21 · 2023: 10 · 2022: 14 · 2021: 8 · 2020: 18 · 2019: 11 · 2018: 7 · 2017: 9 · 2016: 7 · 2015: 6 · 2014: 17 · 2013: 3
FWCI
3.82
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
  • eCommons (Cornell University) (submittedVersion)
Funders
U.S. Department of Energy (DESC0001086)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
  • Physical Sciences › Chemistry › Organic Chemistry › Nanomaterials for catalytic reactions
  • Physical Sciences › Materials Science › Materials Chemistry › Chemical and Physical Properties of Materials
Keywords
surfactant-free synthesis, intermetallic nanoparticles, annealing, particle size control, crystalline order, bimetallic nanoparticles, trimetallic nanoparticles

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