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Issue 29, 2014
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The effect of the nano-silica support on the catalytic reduction of water by gold, silver and platinum nanoparticles – nanocomposite reactivity

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Abstract

Pt°-NPs, prepared by the reduction of PtIV salts with borohydride, do not catalyse the reduction of water in the presence of the strongly-reducing ˙C(CH3)2OH radicals. However, supporting the same metal nanoparticles (M°-NPs) with SiO2 alters the catalytic properties enabling the reaction. This effect depends both on the nature of M° and concentration of the composite nanoparticles. At low nanocomposite concentration: for M = Au nearly no effect is observed; for M = Ag the support decreases the catalytic reduction of water and for M = Pt the support initiates the catalytic process. At high nanocomposite concentration: for M = Au the reactivity is considerably lower and for M = Ag or Pt no catalysis is observed. Furthermore, for M = Ag or Pt H2 reduces the ˙C(CH3)2OH radicals.

Graphical abstract: The effect of the nano-silica support on the catalytic reduction of water by gold, silver and platinum nanoparticles – nanocomposite reactivity

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Article information


Submitted
04 Mar 2014
Accepted
09 Jun 2014
First published
09 Jun 2014

Phys. Chem. Chem. Phys., 2014,16, 15422-15429
Article type
Paper
Author version available

The effect of the nano-silica support on the catalytic reduction of water by gold, silver and platinum nanoparticles – nanocomposite reactivity

T. Zidki, R. Bar-Ziv, U. Green, H. Cohen, D. Meisel and D. Meyerstein, Phys. Chem. Chem. Phys., 2014, 16, 15422
DOI: 10.1039/C4CP00941J

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