Novel two-step synthesis of controlled size and shape platinum nanoparticles encapsulated in mesoporous silica

Z. Kónya, Victor F. Puntes, I. Kiricsi, Ji Zhu, Paul Alivisatos, Gabor A. Somorjai

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Uniform shape and size platinum nanoparticles encapsulated in mesoporous silica (SBA-15) were prepared in the same solution by a novel two-step method. Platinum nanoparticles were prepared in aqueous solution of K2PtCl4, the reduction was carried out by bubbling hydrogen, the capping material was tri-block poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) copolymer. The mesoporous silica was synthesized using the same copolymer as template from tetraethyl orthosilicate by hydrolysis in acidic conditions. The "Pt-nanoparticles-in-mesoporous-silica" system was characterized by a combination of low-angle powder X-ray diffraction, transmission electron microscopy and N2 porosimetry. The platinum nanoparticles are encapsulated in the mesopores and retained their size and morphology. It appears that this hybrid material should be a superior three-dimensional high-surface-area catalyst for selective platinum-catalyzed reactions.

Original languageEnglish
Pages (from-to)137-140
Number of pages4
JournalCatalysis Letters
Volume81
Issue number3-4
DOIs
Publication statusPublished - Aug 2002

Fingerprint

Platinum
Silicon Dioxide
platinum
Silica
Nanoparticles
silicon dioxide
nanoparticles
synthesis
ethylene oxide
Polyethylene oxides
copolymers
Copolymers
Polypropylene oxides
tetraethyl orthosilicate
propylene oxide
Hybrid materials
polypropylene
X ray powder diffraction
hydrolysis
Hydrogen

Keywords

  • Mesoporous silica
  • Metal nanoparticles
  • SBA-15

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

Novel two-step synthesis of controlled size and shape platinum nanoparticles encapsulated in mesoporous silica. / Kónya, Z.; Puntes, Victor F.; Kiricsi, I.; Zhu, Ji; Alivisatos, Paul; Somorjai, Gabor A.

In: Catalysis Letters, Vol. 81, No. 3-4, 08.2002, p. 137-140.

Research output: Contribution to journalArticle

Kónya, Z. ; Puntes, Victor F. ; Kiricsi, I. ; Zhu, Ji ; Alivisatos, Paul ; Somorjai, Gabor A. / Novel two-step synthesis of controlled size and shape platinum nanoparticles encapsulated in mesoporous silica. In: Catalysis Letters. 2002 ; Vol. 81, No. 3-4. pp. 137-140.
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