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Niobium oxide and phosphoric acid impregnated silica–titania as oxidative-acidic bifunctional catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
39911 45839 2014 7 PDF Available
Title
Niobium oxide and phosphoric acid impregnated silica–titania as oxidative-acidic bifunctional catalyst
Abstract

•Silica–titania modified by impregnation of niobium oxide and phosphoric acid.•Catalyst possesses both oxidative active site and Brønsted acid site.•Transformation of 1-octene to 1,2-octanediol through the formation of 1,2-epoxyoctane.•Oxidative-acidic bifunctional catalyst to produce 1,2-octanediol.

Silica–titania modified by impregnation of niobium oxide and phosphoric acid (P/Nb/Ti–Si) possesses both oxidative active site and Brønsted acid. Results of the catalytic evaluation in consecutive transformation of 1-octene to 1,2-octanediol through formation of 1,2-epoxyoctane suggested that Nb2O5 was a more important oxidative active site compared to tetrahedral Ti species. Besides, co-existence of Nb2O5 and PO43− modifiers was crucial for Brønsted acidity formation. However, the amount of Brønsted acid created was strongly dependent on the synthesis method that was greatly influenced by the interfacial interaction between Nb2O5 and PO43− in the material to produce NbOPO43−H+ bonding. It has been demonstrated that the P/Nb/Ti–Si was an excellent oxidative-acidic bifunctional catalyst to produce 1,2-octanediol.

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Keywords
Bifunctional catalyst; Oxidative; Brønsted acidity; Niobium; Phosphoric acid
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 471, 10 February 2014, Pages 142–148
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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