Transformation of [Au.sub.3]M/Si[O.sub.2] into Au-[Mo.sub.x]/ Si[O.sub.2] catalysts for the reduction of p-nitrophenol

Bimetallic [Au.sub.3]M(M = Ni, Co, Fe) nanoparticles (NPs) were synthesized by reducing a mixture of [Au.sup.3+] and metal cations ([Ni.sup.2+], [Co.sup.2+], [Fe.sup.3+]) by butyllithium in the presence of oleylamine. [Au.sub.3]M NPs were then deposited onto a commercial Si[O.sub.2] support. The [Au...

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Bibliographic Details
Published in:Catalysis letters 2014-06, Vol.144 (6)
Main Authors: Lin, Chao, Tao, Kai, Hua, Dayin, Ma, Zhen, Zhou, Shenghu
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Cobalt
Diffraction
Infrared spectroscopy
X-rays
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Summary:Bimetallic [Au.sub.3]M(M = Ni, Co, Fe) nanoparticles (NPs) were synthesized by reducing a mixture of [Au.sup.3+] and metal cations ([Ni.sup.2+], [Co.sup.2+], [Fe.sup.3+]) by butyllithium in the presence of oleylamine. [Au.sub.3]M NPs were then deposited onto a commercial Si[O.sub.2] support. The [Au.sub.3]M/Si[O.sub.2] samples were not particularly active in the catalytic reduction of p-nitrophenol unless they were converted into Au-M[O.sub.x]/Si[O.sub.2] after appropriate thermal treatment in air. The Au-[MO.sub.x]/ Si[O.sub.2] catalysts showed good thermal stability and significantly higher p-nitrophenol conversions than Au/Si[O.sub.2]. Relevant characterization was conducted employing X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy, and ultraviolet-visible spectroscopy.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-014-1224-6