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Solid-state phase transformations in solution: templated conversion of nanoscale nickel phosphides.

Elayaraja Muthuswamy1, Stephanie L Brock

  • 1Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.

Chemical Communications (Cambridge, England)
|October 22, 2011
PubMed
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This summary is machine-generated.

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Nickel phosphide nanoparticles (Ni(12)P(5)) transform into the catalytically active Ni(2)P phase through a solid-state process. This method creates uniform hollow or solid Ni(2)P particles with significant surface area.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Catalysis

Background:

  • Nickel phosphides are crucial in catalysis.
  • Controlling the phase and morphology of nickel phosphides is essential for optimizing catalytic performance.
  • Understanding transformation mechanisms is key to designing advanced catalysts.

Purpose of the Study:

  • To investigate the conversion mechanism of Ni(12)P(5) nanoparticles to Ni(2)P.
  • To develop a method for synthesizing monodisperse Ni(2)P particles with controlled morphology (hollow or solid).
  • To characterize the surface area of the resulting Ni(2)P nanoparticles.

Main Methods:

  • Solid-state transformation of Ni(12)P(5) nanoparticles.
  • Templated synthesis approach.

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  • Characterization of particle morphology and surface area.

    • Main Results:

    • Demonstrated solid-state conversion of Ni(12)P(5) to Ni(2)P, refuting solution dissolution mechanisms.
    • Successfully produced monodisperse hollow or solid Ni(2)P nanoparticles.
    • Achieved a surface area of approximately 17 m(2)/g for the Ni(2)P particles.

    Conclusions:

    • The conversion of Ni(12)P(5) to Ni(2)P proceeds via a solid-state mechanism.
    • Templated solid-state transformation is an effective route to synthesize catalytically active Ni(2)P with controlled morphology.
    • The synthesized Ni(2)P nanoparticles possess a high surface area suitable for catalytic applications.