Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-07-01

Journal: MATERIALS CHARACTERIZATION

Included Journals: EI、SCIE

Volume: 62

Issue: 7

Page Number: 684-690

ISSN: 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.