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Issue 23, 2016
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Ruthenium nanoclusters dispersed on titania nanorods and nanoparticles as high-performance catalysts for aqueous-phase Fischer–Tropsch synthesis

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Abstract

A series of robust nanocatalysts constructed from ruthenium nanoclusters dispersed on titania nanorods and nanoparticles (Ru/TiO2) were synthesized by an amino acid-assisted solution reduction method and applied to aqueous-phase Fischer–Tropsch synthesis (AFTS). These catalysts showed excellent activity (33.8–48.0 molCO molRu−1 h−1, 493 K) and heavy hydrocarbon selectivity (C5+: 59.5–71.3 wt%) toward the AFTS reaction. By coupling with X-ray absorption spectroscopy, X-ray photoelectron spectroscopy and elemental analysis characterization, the effects of H2 reduction pretreatment and metal–support interaction on the catalytic performance were investigated. H2 reduction pretreatment was found to significantly increase the activity and C5+ selectivity of the catalysts for AFTS. Characterization results further indicated that the H2 reduction results in an increased metallic Ru content and the removal of adsorbed amino acids during the preparation process, which produces more fresh Ru active sites. Metal–support interaction between Ru and TiO2 was observed to have a great influence on the reduction degree of Ru nanoclusters. Strong metal–support interaction will hinder the reduction of Ru species to the metallic state, thereby reducing the Fischer–Tropsch synthesis activity and C5+ selectivity.

Graphical abstract: Ruthenium nanoclusters dispersed on titania nanorods and nanoparticles as high-performance catalysts for aqueous-phase Fischer–Tropsch synthesis

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Publication details

The article was received on 01 Aug 2016, accepted on 16 Oct 2016 and first published on 17 Oct 2016


Article type: Paper
DOI: 10.1039/C6CY01643J
Citation: Catal. Sci. Technol., 2016,6, 8355-8363
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    Ruthenium nanoclusters dispersed on titania nanorods and nanoparticles as high-performance catalysts for aqueous-phase Fischer–Tropsch synthesis

    J. Yu, W. Li, T. Zhang, D. Ma and Y. Zhang, Catal. Sci. Technol., 2016, 6, 8355
    DOI: 10.1039/C6CY01643J

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