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, Pt 3 Y-targeted as a prototypical example of an early-late intermetallic-has been synthesized as nanoparticles approximately 5-20 nm in diameter in a solution process and characterized by XRD, TEM, EDS and XPS. The key development is the use of a molten borohydride (MEt 3 BH, M= Na, K) as both the reducing agent and reaction medium. Readily available halide precursors of each metal are used. Accordingly, no organic ligands/surfactants are necessary as the resulting halide salt byproduct prevents sintering, which further permits dispersion of the nanoscale intermetallic onto a support. The versatility of this approach was validated by synthesis of other intermetallic phases such as Pt

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