Chemical Reactivity and Tendency of Fe, Co and Ni Clusters with Ethanol by Using FT-ICR Mass Spectrometer

Abstract

Chemical reaction of transition metal cluster ions (Fe, Co, Ni) with ethanol was investigated by using the FT-ICR mass spectrometer. Metal clusters with 10-20 atoms were generated by a pulsed laser-vaporization supersonic-expansion cluster beam source directly connected to FT-ICR mass spectrometer. Observed reactions are simple chemisorptions of ethanol and dehydrogenated chemisorptions strongly depending on metal species and cluster size. The reaction of iron clusters show simple chemisorptions and the reaction of nickel clusters show dehydrogenated chemisorptions. However cobalt clusters show both reaction patterns. Thus the reaction patterns change according as periodic table. And the cluster sizes which show the maximum reaction rate also shified according as periodic table.