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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

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Published on: April 27, 2018

Platinum-vanadium oxide nanotube hybrids.

Filipels Mello¹, Lídiaoo Costa, Eduardopadrón Hernández

¹Laboratório de Catálise, Instituto Nacional de Tecnologia/MCT, Av, Venezuela, 82, sala 518, Centro, Rio de Janeiro, RJ, 20081-31, Brazil. marco.fraga@int.gov.br.

Nanoscale Research Letters

|July 31, 2010

Summary

Platinum nanoparticles were synthesized on vanadium oxide nanotubes. The reduction method significantly impacts particle size and shape, with hydrogen reduction yielding optimal 6-7 nm particles.

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Area of Science:

Materials Science
Nanotechnology
Catalysis

Background:

Vanadium oxide nanotubes offer unique support properties for nanomaterials.
Platinum-based catalysts are crucial for various chemical reactions.
Controlling nanoparticle characteristics is key to catalyst performance.

Purpose of the Study:

To synthesize and characterize platinum nanoparticles supported on vanadium oxide nanotubes.
To investigate the influence of different reduction procedures on platinum nanoparticle formation.
To identify optimal conditions for producing well-dispersed, small platinum nanoparticles.

Main Methods:

Hydrothermal synthesis of vanadium oxide nanotubes from vanadium pentoxide.
Wet impregnation method for depositing platinum precursors onto nanotubes.

Keywords:

Hybrid materials Nanostructured materials Nanotubes Pt nanoparticles

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X-ray diffraction (XRD) and transmission electron microscopy (TEM) for structural and morphological analysis.

Evaluation of different reduction procedures for platinum nanoparticle formation.

Main Results:

Successful synthesis of platinum nanoparticles on vanadium oxide nanotubes without altering nanotube structure.
Transmission electron microscopy confirmed uniform distribution of nanoparticles along the nanotubes.
The choice of reduction procedure critically influenced platinum particle diameter, dispersion, and shape.
Using H2PtCl6 precursor and hydrogen reduction yielded unagglomerated, round platinum nanoparticles with a mean size of 6-7 nm.

Conclusions:

Vanadium oxide nanotubes are effective supports for platinum nanoparticles.
The reduction process is a critical factor in controlling platinum nanoparticle characteristics.
Hydrogen reduction using H2PtCl6 precursor is the most suitable method for obtaining high-quality platinum nanomaterials on these supports.