Platinum nanoparticles synthesis

Polyol Synthesis of Platinum Nanoparticles:  Control of Morphology with Sodium Nitrate

Abstract ImageDepartment of Materials Science and Engineering and Department of Chemistry, University of Washington, Seattle, Washington 98195

Nano Lett., 2004, 4 (12), pp 2367–2371

DOI: 10.1021/nl048570a

Section:

Abstract

Morphological control over platinum nanoparticles was realized by varying the amount of NaNO3 added to a polyol process, where H2PtCl6 was reduced by ethylene glycol to form PtCl42- and Pt0 at 160 °C. As the molar ratio between NaNO3 and H2PtCl6 was increased from 0 to 11, the morphology of Pt nanoparticles evolved from irregular spheroids with rounded profiles to tetrahedra and octahedra with well-defined facets.Cover Image synthesis, and the nitrite could then form stable complexes with both Pt(II) and Pt(IV) species. As a result, the reduction of Pt precursors by ethylene glycol was greatly slowed. This change in reaction kinetics altered the growth rates associated with different crystallographic directions of the Pt nanocrystals and ultimately led to the formation of different morphologies.

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This article has been cited by 56 ACS Journal articles (5 most recent appear below).

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      Highly uniform Pt icosahedral nanocrystals with an edge length of 8.8 nm were synthesized in nonhydrolytic systems using the hot injection-assisted GRAILS (gas reducing agent in liquid solution) method. The results show the key factors for the shape ...

    • Source: pubs.acs.org
    ProQuest, UMI Dissertation Publishing Synthesis, characterization and optimization of platinum-alloy nanoparticle catalysts in proton exchange membrane fuel cells.
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