By a News Reporter-Staff News Editor at Science Letter -- Researchers detail new data in Heavy Metals. According to news reporting out of Johannesburg, South Africa, by NewsRx editors, research stated, "Shaped carbon materials with different nanostructures, i.e. carbon nanofibers (CNFs), carbon nano-tubes (CNTs) and carbon micro-coils (CMCs) were prepared by catalytic chemical vapor deposition. Co catalysts supported on CNFs, CNTs and CMCs were prepared by incipient wetness impregnation."
Our news journalists obtained a quote from the research from the University of Witwatersrand, "The structure and surface properties of these carbon materials were studied. The influence of the different supports on the appearance, size and dispersion of cobalt particles, as well as on their reducibility, was studied by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, N-2 adsorption desorption measurements, thermogravimetric analysis, temperature-programmed reduction, H-2-chemisorption and O-2 titration. The different shaped carbon supports were found to affect the Co reducibility and dispersion by modifying the functionalization on the support surface, i.e. by changing the metal-support interactions. The Fischer-Tropsch synthesis (FTS) performance of these cobalt catalysts was influenced by the reducibility and dispersion of the catalysts on the different carbon materials."
According to the news editors, the research concluded: "Finally, cobalt catalysts with cobalt particles sited both inside and outside of the CNTs were prepared and revealed the effect of a pore confinement on the reducibility, dispersion and performance of cobalt catalysts in FTS."
For more information on this research see: Cobalt catalysts supported on a micro-coil carbon in Fischer-Tropsch synthesis: A comparison with CNTs and CNFs. Catalysis Today, 2013;214():50-60. Catalysis Today can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Catalysis Today - www.elsevier.com/wps/product/cws_home/500857)
Our news journalists report that additional information may be obtained by contacting H.F. Xiong, University of Witwatersrand, Sch Chem & Met Engn, ZA-2050 Johannesburg, South Africa. Additional authors for this research include M.A.M. Motchelaho, M. Moyo, L.L. Jewell and N.J. Coville (see also Heavy Metals).
Keywords for this news article include: Cobalt, Johannesburg, South Africa, Heavy Metals, Transition Elements
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