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MoCx species embedded in ordered mesoporous silica framework with hierarchical structure for hydrogenation of naphthalene

Paper ID Volume ID Publish Year Pages File Format Full-Text
39537 45826 2015 7 PDF Available
Title
MoCx species embedded in ordered mesoporous silica framework with hierarchical structure for hydrogenation of naphthalene
Abstract

•MoVI–melamine hybrids were used as single-source precursor for MoCx.•MoCx was incorporated into ordered mesoporous silica framework via an integrated route.•MoCx was anchored by in situ formed carbon tubes.•The MoCx composite showed high selectivity to tetralin in naphthalene hydrogenation.

An integrated route to accomplish the incorporation of MoCx species into ordered mesoporous silica framework (OMSF) was presented. The MoVI–melamine hybrids were used as the single-source precursors for molybdenum carbides and participated in the assembling process of the silica building blocks that gave rise to the OMSF preform. The pore diameter and the volume of the resulting MoCx@OMSF samples were characterized by gradually increasing with the amount of the added hybrids, which, among other things, maximized the space inside the silica tubes at the highest Mo loading. The thermal decomposition of the P123 micelles with the catalysis of the in situ formed Mo species generated the tube-like carbon framework within the silica tubes. The finely incorporation of the MoCx species to the carbon framework was supposed to account for the good stability of the carbide phase in the hydrogenation of naphthalene. Ultra-high selectivity of ∼98% to tetralin was achieved on the MoCx@OMSF samples thanks to the moderate hydrogenating ability of the carbide phase, indicating potential use of molybdenum carbide based composites as low-cost selective catalysts for industrially relevant partial hydrogenations.

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Keywords
Molybdenum carbide; Incorporation; Single-source precursor; Naphthalene hydrogenation; Tetralin
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MoCx species embedded in ordered mesoporous silica framework with hierarchical structure for hydrogenation of naphthalene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 490, 25 January 2015, Pages 146–152
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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