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Indexed by:期刊论文

Date of Publication:2011-07-01

Journal:MATERIALS CHARACTERIZATION

Included Journals:SCIE、EI

Volume:62

Issue:7

Page Number:684-690

ISSN No.:1044-5803

Key Words:Ni-Mo-W sulfide; Unsupported catalyst; Microstructure; Curvature

Abstract:An exploration was made on structure and active sites of the unsupported Ni-Mo-W sulfide hydrodesulphurization catalyst prepared by a thiosalt decomposition method. More insights into the nanocomposite structure were provided by introducing the concept of average curvature of Mo(W)S-2 and establishing a new structure model. The defects of cross and mixed stacks, steps along c-axis, expansion of (002) interplanar spacing and mixing structure of Mo(W)/Ni sulfides were investigated using advanced electron microscopy. All these defects in Mo(W) sulfides are closely correlated with increasing active sites of unsupported Ni-Mo-W sulfide catalyst. (C) 2011 Elsevier Inc. All rights reserved.