Precursor controlled synthesis of graphene oxide supported iron catalysts for FischerTropsch synthesisElectronic supplementary information (ESI) available. See DOI: 10.1039/c8cy00617b

Precursor controlled synthesis of graphene oxide supported iron catalysts for FischerTropsch... In this study, graphene oxide supported iron catalysts have been successfully synthesized by a hydrothermal method using three different iron precursors: ferrous acetate Fe(C2H3O2)2, ferric oxalate Fe2(C2O4)3 and ferric nitrate Fe(NO3)3. The Fe2(C2O4)3 derived catalysts (Fe/G-C) present a uniform dispersion with smaller sizes of iron nanoparticles (NPs). Density functional theory (DFT) calculations indicate the higher binding energy between ferric oxalate and graphene oxide (1.53 eV) facilitates the formation of more seeds for nanoparticle growth, and therefore, smaller size and narrow size distribution of NPs are achieved. The Fe/G-C also exhibits easier reduction and carburization, resulting in high FischerTropsch synthesis (FTS) activity and C5+ selectivity. Our thorough characterization studies enable us to conclude that the iron precursors significantly impact the structural properties of catalysts, which further affect their reduction/carburization abilities and FTS performances. This study affords us a rational design of high efficiency graphene oxide supported iron catalysts for FTS. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Catalysis Science & Technology Royal Society of Chemistry

Precursor controlled synthesis of graphene oxide supported iron catalysts for FischerTropsch synthesisElectronic supplementary information (ESI) available. See DOI: 10.1039/c8cy00617b

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Publisher
The Royal Society of Chemistry
Copyright
This journal is © The Royal Society of Chemistry
ISSN
2044-4753
eISSN
2044-4761
D.O.I.
10.1039/c8cy00617b
Publisher site
See Article on Publisher Site

Abstract

In this study, graphene oxide supported iron catalysts have been successfully synthesized by a hydrothermal method using three different iron precursors: ferrous acetate Fe(C2H3O2)2, ferric oxalate Fe2(C2O4)3 and ferric nitrate Fe(NO3)3. The Fe2(C2O4)3 derived catalysts (Fe/G-C) present a uniform dispersion with smaller sizes of iron nanoparticles (NPs). Density functional theory (DFT) calculations indicate the higher binding energy between ferric oxalate and graphene oxide (1.53 eV) facilitates the formation of more seeds for nanoparticle growth, and therefore, smaller size and narrow size distribution of NPs are achieved. The Fe/G-C also exhibits easier reduction and carburization, resulting in high FischerTropsch synthesis (FTS) activity and C5+ selectivity. Our thorough characterization studies enable us to conclude that the iron precursors significantly impact the structural properties of catalysts, which further affect their reduction/carburization abilities and FTS performances. This study affords us a rational design of high efficiency graphene oxide supported iron catalysts for FTS.

Journal

Catalysis Science & TechnologyRoyal Society of Chemistry

Published: May 17, 2018

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