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Sonochemical Synthesis and Catalytic Properties of Nanostructured Molybdenum Carbide

Published online by Cambridge University Press:  15 February 2011

Kenneth S. Suslick ,
Taeghwan Hyeon ,
Mingming Fang  and
Andrzej A. Cichowlas
Kenneth S. Suslick
Affiliation:
School of Chemical Sciences and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 505 S. Mathews Ave., Urbana, IL 61801
Taeghwan Hyeon
Affiliation:
School of Chemical Sciences and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 505 S. Mathews Ave., Urbana, IL 61801
Mingming Fang
Affiliation:
School of Chemical Sciences and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 505 S. Mathews Ave., Urbana, IL 61801
Andrzej A. Cichowlas
Affiliation:
School of Chemical Sciences and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 505 S. Mathews Ave., Urbana, IL 61801
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Abstract

Molybdenum hexacarbonyl in hexadecane was irradiated with high intensity ultrasound under argon at 90°C to yield face centered cubic molybdenum carbide, Mo2C. After thermal treatment, oxygen and excess carbon were removed to give stoichiometric Mo2C. SEM micrographs showed that the surface was extremely porous. TEM micrographs showed that the solid was an aggregate of particles with diameters of ≈ 2 nm. This material has a very high surface area, 188 m2/g as determined by BET gas adsorption. Catalytic studies have been conducted on the dehydrogenation of cyclohexane and the hydrogenolysis of ethane. The sonochemically prepared Mo2C shows good catalytic activity for the dehydrogenation of cyclohexane with 100% selectivity for formation of benzene without hydrogenolysis to methane. The material revealed poor catalytic activity for the hydrogenolysis of ethane.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 351: Symposium V – Molecularly Designed Ultrafine/Nanostructured Materials , 1994 , 201
Copyright
Copyright © Materials Research Society 1994

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