Surface characterization and catalytic CO + H2 reaction on Fe82.2B17.8 amorphous alloy |
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| Authors: | G Kisfaludi K Lázár Z Schay L Guczi Cs Fetzer G Konczos A Lovas |
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| Institution: | Institute of Isotopes of the Hungarian Academy of Sciences, P.O. Box 77, H-1525 Budapest, Hungary;Central Research Institute for Physics of the Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary |
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| Abstract: | Fe82.2B17.8 amorphous ribbon has been used as a catalyst for the Fischer-Tropsch-type reaction of CO+H2. Specific activity has been found to be at least an order of magnitude higher than that of either the crystallized ribbon of identical composition or the supported iron catalyst. Before and after the catalytic tests the ribbons were characterized by XRD, XPS, UPS and Mössbauer spectroscopy in transmission and in conversion electron modes. Conversion electron Mössbauer spectroscopy and UPS proved that the surface of the amorphous ribbons is being partially crystallized during 8000 min reaction time at a maximum reaction temperature of 560 K. The superior catalytic activity has been explained by stabilization of the small iron particles and Fe2O3 by boron atoms at the surface and by suppressed carbide formation. |
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| Keywords: | To whom correspondence should be addressed |
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