NDLI: Hydrodeoxygenation of p-cresol on MoS$_{2}$: the effect of adding hexadecyl trimethyl ammonium bromide during the catalyst synthesis

Content Provider	Springer Nature Link
Author	Wang, Weiyan Li, Lu Zhang, Kun Qiao, Zhiqiang Liu, Pengli Yang, Yunquan
Copyright Year	2014
Abstract	This study prepared unsupported MoS$_{2}$ catalysts by a one-step hydrothermal method using ammonium heptamolybdate and thiocarbamide as materials. The morphology and microstructure of MoS$_{2}$ catalysts were changed by adding different amounts of hexadecyl trimethyl ammonium bromide (CTAB). The resultant catalysts were characterized by X-ray diffraction, nitrogen physisorption and transmission electron microscopy. The surface area and pore volume of MoS$_{2}$ increased first and then decreased with the addition amount of CTAB. The structural difference between these catalysts lies in the number of layers in stacks and slab length of MoS$_{2}$ structure. The structure–activity correlation was studied by using the hydrodeoxygenation (HDO) of p-cresol as the probe reaction. In the HDO of p-cresol, the end products were toluene, 4-methylcyclohexene and methylcyclohexane, and the possible HDO reaction routes were proposed. The effects of addition of CTAB during the synthesis of MoS$_{2}$ and HDO reaction temperature on conversion and products distribution were analyzed. The changes of product distribution were explained based on the Rim-Edge model. The direct deoxygenation (DDO) route occurs on the edge active sites while the hydrogenation–dehydration (HYD) route occurs on brim sites of multi-stacks MoS$_{2}$ particles. Thus, the slab length and slab stacking layers had a great effect on the catalytic activity of MoS$_{2}$ and products distribution.
Starting Page	417
Ending Page	429
Page Count	13
File Format	PDF
ISSN	18785190
Journal	Reaction Kinetics and Catalysis Letters
Volume Number	113
Issue Number	2
e-ISSN	18785204
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-08-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	MoS$_{2}$ catalyst CTAB p-Cresol Hydrodeoxygenation Structure–activity correlation Catalysis Physical Chemistry Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Catalysis

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