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MoS2 monolayer catalyst doped with isolated Co atoms for the hydrodeoxygenation reaction

Liu, G; Robertson, AW; Li, MM-J; Kuo, WCH; Darby, MT; Muhieddine, MH; Lin, Y-C; ... Tsang, SCE; + view all (2017) MoS2 monolayer catalyst doped with isolated Co atoms for the hydrodeoxygenation reaction. Nature Chemistry , 9 (8) pp. 810-816. 10.1038/nchem.2740. Green open access

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Abstract

The conversion of oxygen-rich biomass into hydrocarbon fuels requires efficient hydrodeoxygenation catalysts during the upgrading process. However, traditionally prepared CoMoS2 catalysts, although efficient for hydrodesulfurization, are not appropriate due to their poor activity, sulfur loss and rapid deactivation at elevated temperature. Here, we report the synthesis of MoS2 monolayer sheets decorated with isolated Co atoms that bond covalently to sulfur vacancies on the basal planes that, when compared with conventionally prepared samples, exhibit superior activity, selectivity and stability for the hydrodeoxygenation of 4-methylphenol to toluene. This higher activity allows the reaction temperature to be reduced from the typically used 300 °C to 180 °C and thus allows the catalysis to proceed without sulfur loss and deactivation. Experimental analysis and density functional theory calculations reveal a large number of sites at the interface between the Co and Mo atoms on the MoS2 basal surface and we ascribe the higher activity to the presence of sulfur vacancies that are created local to the observed Co–S–Mo interfacial sites.

Type: Article
Title: MoS2 monolayer catalyst doped with isolated Co atoms for the hydrodeoxygenation reaction
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/nchem.2740
Publisher version: http://dx.doi.org/10.1038/nchem.2740
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Energy, Heterogeneous catalysis, Two-dimensional materials
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1540867
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