4.8 Article

Synthesis of Pt3Y and Other Early-Late Intermetallic Nanoparticles by Way of a Molten Reducing Agent

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 16, Pages 5672-5675

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b01366

Keywords

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Funding

  1. BASF Corporation through the California Research Alliance (CARA) [03968]
  2. Office of Science, Office of Basic Energy Sciences, U.S. Department of Energy [DE-AC02-05CH11231]

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Early late intermetallic phases have garnered increased attention recently for their catalytic properties. To achieve the high surface areas needed for industrially relevant applications, these phases Must be synthesized as nanoparticles in a scalable fashion. Herein, Pt3Y-targeted as a prototypical example of an early late intermetallic-has been synthesized as nanoparticles approximately 5-20 nm in diameter via a solution process and characterized by XRD, TEM, EDS, and XPS. The key development is the use of a molten borohydride (MEt3BH, M = Na, K) as both the reducing agent and reaction medium. Readily available halide precursors of the two metals are used. Accordingly, no organic ligands are necessary, as the resulting halide salt byproduct prevents sintering, which further permits dispersion of the nano scale intermetallic onto a support. The versatility of this approach was validated by the synthesis of other intermetallic phases such as Pt3Sc, Pt3Lu, Pt2Na, and Au2Y.

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