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; D. Meyerstein

doi:10.1039/c4cp00941j

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
, D. Meyerstein

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Pt°-NPs, prepared by the reduction of Pt^IV 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. This journal is

Original language	English
Pages (from-to)	15422-15429
Number of pages	8
Journal	Physical Chemistry Chemical Physics
Volume	16
Issue number	29
DOIs	https://doi.org/10.1039/c4cp00941j
State	Published - 7 Aug 2014

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1039/c4cp00941j

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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. This journal is",

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AU - Zidki, T.

AU - Bar-Ziv, R.

AU - Green, U.

AU - Cohen, H.

AU - Meisel, D.

AU - Meyerstein, D.

PY - 2014/8/7

Y1 - 2014/8/7

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AB - 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. This journal is

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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

Abstract

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