Release Time:2020-05-17  Hits:

Indexed by: Journal Papers

Date of Publication: 2020-03-21

Journal: CATALYSIS SCIENCE & TECHNOLOGY

Included Journals: SCIE

Volume: 10

Issue: 6

Page Number: 1809-1815

ISSN: 2044-4753

Abstract: Oxidative dehydrogenation of ethylbenzene to styrene featured with a non-equilibrium-limit is an alternative to the direct dehydrogenation process, but often exhibits low styrene selectivity caused by deep-oxidation over metal oxide catalysts. Herein, we report a nonmetallic BN embedded graphitic carbon catalyst which was synthesized by a one-step co-pyrolysis method using boric acid, urea and ammonium iron citrate as the reactants. The obtained catalyst exhibits a high styrene selectivity of 94%. The existence of abundant carbonyl groups and BO species could correspondingly contribute more reaction sites and extra oxygen adsorption sites. A higher styrene formation rate of 5.8 mmol g(cat)(-1) h(-1) is thus achieved for our BN embedded graphitic carbon catalyst, whereas this value is 3.4 mmol g(cat)(-1) h(-1) for sole carbon nanotubes and 0.2 mmol g(cat)(-1) h(-1) for BN. Such promoted reactivity for oxidative dehydrogenation of ethylbenzene is derived from the synergetic and collaborative effect of the nonmetallic BN and graphitic carbon catalyst.