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Nickel nanoparticles embedded in the framework of mesoporous TiO2: Efficient and highly stable catalysts for hydrodechlorination of chlorobenzene

Paper ID Volume ID Publish Year Pages File Format Full-Text
41127 45877 2012 8 PDF Available
Title
Nickel nanoparticles embedded in the framework of mesoporous TiO2: Efficient and highly stable catalysts for hydrodechlorination of chlorobenzene
Abstract

Mesoporous TiO2-supported metallic Ni catalysts were prepared through a multicomponent assembly approach, where surfactant, titania, and nickel precursor were cooperatively assembled in a one-pot process. With the characterization of transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, N2 physisorption, hydrogen temperature-programmed reduction, and hydrogen temperature-programmed desorption, the resultant Ni nanoparticles were identified to be homogenously embedded within the framework of TiO2 ranging in size from 1 to 6 nm. The embedment of Ni within the framework of support resulted in larger interface between Ni and support and thus stronger Ni–TiO2 interaction. During the gas-phase hydrodechlorination of chlorobenzene reaction, the as-prepared 0.23%-Ni/TiO2-DS delivered turnover frequency up to 1.5 times greater than that associated with the reference Ni/TiO2 catalyst prepared by conventional incipient-wetness impregnation method. Meanwhile, the as-prepared 0.23%-Ni/TiO2-DS also exhibited much improved stability for a continuous reaction of 30 h than the reference catalyst. The remarkable enhancement of the catalytic performances was found to depend on the strong metal–support interaction.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (95 K)Download as PowerPoint slideHighlights► Here a novel nickel nanoparticles embedded within the framework of mesoporous TiO2 were prepared. ► An optimum Ni loading is detected. ► These catalysts exhibited much higher activity and stability than the conventionally prepared reference catalyst. ► These performances were related to the electronic structure of Ni and the strong Ni–support interaction.

Keywords
Nickel; Mesoporous titania; Embedment; Hydrodechlorination; Chlorobenzene; Metal–support interaction
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Nickel nanoparticles embedded in the framework of mesoporous TiO2: Efficient and highly stable catalysts for hydrodechlorination of chlorobenzene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 413–414, 31 January 2012, Pages 350–357
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