In situ production of high purity noble metal nanoparticles on fumed silica and catalytic activity towards 2-nitrophenol reduction

Alina V. Korobeinyk, Raymond D.L. Whitby, Sergey V. Mikhalovsky, Vassilis J. Inglezakis

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In-situ synthesis of chemically pure noble metal (Au, Pt, Pd, Ru) nanoparticles was performed via redox reaction under ambient conditions from aqueous noble metal salt solutions on non-porous fumed silica. Nanoparticles of average sizes <5 and up to 19 nm were obtained. The nanostructured fumed silica with surface modified by triethoxysilane has been proven an effective support for noble metal nanoparticles synthesis. The silicon-hydride groups on the silica surface not only directly reduce noble metal ions from solution, but they also stabilize metal nanoparticles by bonding with the solid matrix. The nanocomposites were studied for the reduction of 2-nitrophenol showing very high activity at room temperature following the order Pd > Au > Ru > Pt.

Original languageEnglish
Pages (from-to)28-34
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume127
Early online date5 Dec 2018
DOIs
Publication statusPublished - 30 Apr 2019

Keywords

  • 2-nitrophenol
  • Fumed silica
  • Nanoparticles
  • Noble metal
  • Redox
  • Silicon-hydride

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