Preparation of MoS2 catalysts by in situ decomposition of tetraalkylammonium thiomolybdates

被引：82

作者：

Alonso, G

Del Valle, M

Cruz, J

Petranovskii, V

Licea-Claverie, A

Fuentes, S

机构：

[1] UNAM, Inst Fis, San Ysidro, CA 92143 USA

[2] Ctr Invest Cientif & Educ Super Ensenada, Ensenada, Baja California, Mexico

[3] UABC, Fac Ciencias Quim, Tijuana, BC, Mexico

[4] Inst Tecnol Tijuana, Grad Ctr, Tijuana, BC, Mexico

来源：

CATALYSIS TODAY | 1998年 / 43卷 / 1-2期

关键词：

MoS2; tetraalkylammonium thiosalts; in situ activation; hydrodesulfurization; mechanochemistry;

D O I：

10.1016/S0920-5861(98)00140-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Molybdenum tetraalkylammonium thiosalts were used as precursors for the in situ formation of MoS2 catalysts for dibenzothiophene hydrodesulfurization. The influence of the chemical composition of precursors (R4N)(2)MoS4 With R=H+, CH3+ or C4H9+ and mechanical pressing of precursors on the composition and activity of prepared catalysts was investigated. The change of cation from proton to methyl- and to butylammonium increased the surface area and HDS activity of MoS2 catalysts. Extremely high surface area surpassing 200 m(2)/g was obtained for catalysts formed from tetrabutylammonium thiomolybdate. Significant difference was observed for pattern of thermal decomposition of alkylammonium thiosalts compared to ammonium ones. Unusual sponge-like morphology by reason of appearance of secondary porosity was observed in the case of tetrabutylammonium precursors. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：117 / 122

页数：6

共 20 条

[1]

ALONSO G, UNPUB CATAL LETT

[2]

ALONSO G, 1997, IN PRESS INORG CHIM

[3] EVIDENCE OF MICROSTRUCTURAL MODIFICATION IN AMORPHOUS MOLYBDENUM SULFIDES OBTAINED FROM DC AND AC CONDUCTIVITIES AND ELECTRON-SPIN-RESONANCE MEASUREMENTS [J].