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Structural Aspects of Ternary Phase Ni/MoWS2 Catalyst: An Aberration Corrected HRTEM Study

Published online by Cambridge University Press:  30 September 2013

M. Ramos ,
B. Torres ,
Daniel Bahena ,
M. José-Yacamán ,
Lorena Alvarez-Contreras  and
R.R. Chianelli
M. Ramos*
Affiliation:
Materials Research and Technology Institute, University of Texas at El Paso, 500W University Ave, El Paso, TX. 79968, U.S. Departmento de Física y Matemáticas, Universidad Autónoma de Ciudad Juárez, Avenida del Charro #450 N Ciudad Juarez, Chihuahua, MX. 32310
B. Torres
Affiliation:
Materials Research and Technology Institute, University of Texas at El Paso, 500W University Ave, El Paso, TX. 79968, U.S.
Daniel Bahena
Affiliation:
Department of Physics, University of Texas at San Antonio, One UTSA Circle, 78249 U.S.
M. José-Yacamán
Affiliation:
Department of Physics, University of Texas at San Antonio, One UTSA Circle, 78249 U.S.
Lorena Alvarez-Contreras
Affiliation:
Centro de Investigación en Materiales Avanzados S.C., Laboratorio Nacional de Nanotecnología. Chihuahua Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, C. P. 31109 México
R.R. Chianelli
Affiliation:
Materials Research and Technology Institute, University of Texas at El Paso, 500W University Ave, El Paso, TX. 79968, U.S.
*
*Corresponding author: [email protected], [email protected]
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Abstract

In the past 20 years, one of the best catalytic materials for hydrodesulphurization reactions of crude oil has been the transition sulfides, MoS2, known also as the “workhorse” of the refinery industry. It has been proven by this and other research groups that the MoS2 laminar structure can increase its catalytic activity when promoted with cobalt or nickel. The location of active sites seem to be at rim and edge sites on that particular laminar structure, as demonstrated using Mössbauer spectroscopy and x-ray techniques. However, due to maximum capability of this promoted systems, Co(Ni)/MoS2 to remove heterogeneous atoms (S, N, O) - a search for new catalytic materials has currently been an ongoing activity in the HDS community. Here, we will present the new family of ternary phase catalyst with special emphasis on their structural aspects, as revealed by aberration corrected (Cs) high-resolution transmission electron microscopy techniques, in an attempt to describe the nature of active sites on this porous nano-rod like catalytic materials.

Keywords

MoS2HRTEMCatalyticHDScatalyticscanning transmission electron microscopy (STEM)nanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1548: Symposium N – Nanomaterials in the Subnanometer-Size Range , 2013 , mrss13-1548-n05-05
Copyright
Copyright © Materials Research Society 2013 

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References

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