Size-Dependent Activity and Selectivity of Fe/MCF-17 in the Catalytic Hydrogenation of Carbon Monoxide Using Fe(0) Nanoparticles as Precursors - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles ACS Catalysis Year : 2016

Size-Dependent Activity and Selectivity of Fe/MCF-17 in the Catalytic Hydrogenation of Carbon Monoxide Using Fe(0) Nanoparticles as Precursors

Abstract

Monodisperse Fe(0) nanoparticles with diameters between 1.8 and 9.0 nm were prepared from organometallic {Fe[N(SiMe3)2]2}2 and intercalated into mesoporous MCF-17 silica. We observed high turnover frequencies of the catalytic CO hydrogenation; they increased with Fe particle size. Methane and short-chain olefin selectivities were highest for small particles, while the opposite trend applied to long-chain terminal olefins and oxygenates. The Anderson–Schulz–Flory chain lengthening probabilities were found to increase with Fe particle size for both paraffins and terminal olefins. Reaction-induced sintering of the metal particles was limited and could be explained by the transformation of Fe(0) precursors into (mainly) Fe-carbides. The results cast new light on the structure sensitivity of the catalytic CO hydrogenation.
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Dates and versions

hal-01983179 , version 1 (16-01-2019)

Identifiers

  • HAL Id : hal-01983179 , version 1

Cite

Viacheslav Iablokov, Yizhi Xiang, Anca Meffre, Pier-Francesco Fazzini, Bruno Chaudret, et al.. Size-Dependent Activity and Selectivity of Fe/MCF-17 in the Catalytic Hydrogenation of Carbon Monoxide Using Fe(0) Nanoparticles as Precursors. ACS Catalysis, 2016, 6 (4), pp.2496-2500. ⟨hal-01983179⟩
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