Solid state morphology and size tuning of nanostructured platinum using macromolecular complexes

• CARLOS DÍAZ ^[1] ; MARÍA LUISA VALENZUELA ^[2] ; RODRIGO BAEZ ^[3] ; MARJORIE SEGOVIA ^[1]
  1. [1] Universidad de Chile Facultad de Ciencias Departamento de Química
  2. [2] Universidad Autónoma de Chile Instituto de Ciencias Quimicas Aplicadas Inorganic Chemistry and Molecular Materials Center
  3. [3] Universidad Andres Bello Facultad de Ciencias Exactas

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• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 60, Nº. 4, 2015, págs. 2716-2720
• Idioma: inglés
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  • The macromolecular complexes Chitosan●(PtCl2)n and PSP-co-4-PVP●(PtCl2)n, were prepared from the respective polymer and PtCl2 in metal:polymer molar ratios 1:1 and 1:5. Pyrolisis of the macromolecular complexes Chitosan●(PtCl2)n and PSP-co-4-PVP●(PtCl2)n at 800 °C under air affords cubic nanostructured Pt in the pure phase. The morphology of the pyrolityc products depends on the molar metal:polymer ratio; i.e. a "cotton" 3D shape for the 1:1 ratio and a 'foamy" 3D shape for the 1:5 ratio. On the other hand, the particle size depends on the polymer nature, obtaining Pt nanoparticles as small as 6 nm for the chitosan precursors in both molar ratio.