%D 2012
%A S. Ali
%A N.A. Mohd Zabidi
%A D. Subbarao
%L scholars3103
%K Average particle size; CNTs; CO chemisorption; Degree of reduction; External surfaces; Fischer Tropsch; Fischer-Tropsch reaction; High temperature; Iron nanoparticles; Low temperatures; Metal loadings; Metal nanoparticles; Metal particle; Nano-catalyst; Nanocatalysts; Physicochemical property; Temperature-programmed reduction; Two-temperature; Well-dispersed; Wet impregnation method, Carbon nanotubes; Catalysts; Chemisorption; Cobalt; Iron; Metals; Nanoparticles; Particles (particulate matter); Transmission electron microscopy; X ray diffraction; X ray diffraction analysis, Fischer-Tropsch synthesis
%X Cobalt and iron are common catalysts used in the Fischer-Tropsch (FT) reaction. This paper presents the synthesis and characterization of monometallic and bimetallic cobalt and iron nanoparticles supported on carbon nanotubes (CNTs). The CNTs-supported nanocatalysts were synthesized by a wet impregnation method at various ratios of Fe:Co. The physicochemical properties of the samples were analyzed by H 2-temperature programmed reduction (TPR), CO and H 2-chemisorption analyses, transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. The effects of incorporation of Fe into Co on the physicochemical properties of Co/CNTs in terms of degree of reduction, CO and H 2 chemisorptions and morphologies were investigated. TEM showed that metal nanoparticles were well dispersed on the external surface and inside the CNTs. For monometallic Co/CNTs and Fe/CNTs, the average metal particle size was 5±1 nm and 6±1 nm, respectively. For the bimetallic 70Co30Fe/CNTs nanocatalysts, the average particle size was found to be 4±1 nm. Metal particles attached to the outer walls were bigger than the ones inside the CNTs. H 2-TPR analysis of Co/CNTs indicated two temperature regions at 330°C (low temperature) and 491°C (high temperature). The incorporation of iron into cobalt nanocatalysts of up to 30  of the total metal loading enhanced the catalyst's H 2 and CO chemisorptions capacities and reducibility. © (2011) Trans Tech Publications, Switzerland.
%O cited By 7
%J Journal of Nano Research
%T Synthesis and characterization of bimetallic Fe/Co nanocatalyst on CNTs for Fischer-Tropsch reaction
%R 10.4028/www.scientific.net/JNanoR.16.9
%V 16
%P 9-14