Issue 14, 2017

Designing MoS2 nanocatalysts with increased exposure of active edge sites for anthracene hydrogenation reaction

Abstract

Designing MoS2 nanocatalysts rich with active edge sites by engineering of the nanostructures is an effective strategy to enhance their catalytic activity. A series of MoS2 nanoflowers with self-assembled nanosheets was successfully synthesized by engineering of nanostructures. The compositions and structures of MoS2 nanoflowers were characterized by elemental analysis, XPS, TG, XRD, Raman, SEM, and HRTEM. The growth mechanism for MoS2 samples was proposed. MoS2 nanoflowers with a short slab of 5–10 nm, 3–5 stacking layers and expanded basal spacing of 0.98 nm were synthesized via a one-pot solvothermal synthesis method using high boiling point and viscosity ethylene glycol as solvent, maximizing the exposure of active edge sites. In the catalytic anthracene hydrogenation reaction in a slurry-phase reactor, the hydrogenation percentage and selectivity to deep hydrogenation products of the optimized MoS2 nanoflowers are respectively 3.2 times and 31.2 times as high as those of commercial MoS2. The structure–activity relationship of MoS2 catalysts suggests that the engineering of nanostructures to increase the exposure of active edge sites can dramatically improve the catalytic hydrogenation performance of MoS2 catalysts. This study provides the theoretical instructions for designing MoS2 catalysts with improved activity. The increased understanding and research on MoS2 catalysts will drive the industrialization of heavy oil/residue conversion into clean fuels.

Graphical abstract: Designing MoS2 nanocatalysts with increased exposure of active edge sites for anthracene hydrogenation reaction

Supplementary files

Article information

Article type
Paper
Submitted
26 شعبان 1438
Accepted
25 رمضان 1438
First published
25 رمضان 1438

Catal. Sci. Technol., 2017,7, 2998-3007

Designing MoS2 nanocatalysts with increased exposure of active edge sites for anthracene hydrogenation reaction

Y. Jiang, D. Wang, J. Li, M. Li, Z. Pan, H. Ma, G. Lv, W. Qu, L. Wang and Z. Tian, Catal. Sci. Technol., 2017, 7, 2998 DOI: 10.1039/C7CY01026E

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