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Nickel silicides prepared from organometallic polymer as efficient catalyst towards hydrogenation of phenylacetylene

Paper ID Volume ID Publish Year Pages File Format Full-Text
54229 47001 2015 8 PDF Available
Title
Nickel silicides prepared from organometallic polymer as efficient catalyst towards hydrogenation of phenylacetylene
Abstract

•Single-phase Ni2Si was prepared by temperature programmed pyrolysis method.•Catalytic activity of Ni2Si depends on pyrolysis temperature, flow, and Si/Ni ratio.•Selectivity to ST is ca. 90% in hydrogenation of PA on the single-phase Ni2Si.•Alkali treatment improves significantly the catalytic activity of Ni2Si.

A single-phase Ni2Si nanoparticle catalyst was prepared successfully by using temperature programmed pyrolysis method with polydimethylsilane-Ni(acac)2 as precursor and was characterized by thermogravimetric analysis, X-ray diffraction, X-ray photoelectron emission microscopy, energy dispersive X-ray spectroscopy, and transmission electron microscopy. The pyrolysis temperature for generating pure Ni2Si in H2/Ar mixture is significantly lower than that for treatment in Ar. Ni2Si nanoparticles would be reduced to Ni nanoparticles by H2 with increasing pyrolysis temperature (>600 °C). The catalytic hydrogenation of phenylacetylene on Ni2Si nanoparticles was investigated at 1.0 MPa hydrogen and 80 °C. The catalysts show suitable conversion of phenylacetylene and notable selectivity to styrene with 90%. In addition, catalytic performance on Ni2Si prominently improves after removing the SiO2 layer around Ni2Si nanoparticles by alkali treatment.

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Keywords
Temperature programmed pyrolysis; Nickel silicides; Phenylacetylene hydrogenation; Alkali treatment
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Nickel silicides prepared from organometallic polymer as efficient catalyst towards hydrogenation of phenylacetylene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 246, 15 May 2015, Pages 176–183
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us