2000
DOI: 10.1021/jp0028610
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Adsorption and Reaction of Methanol Molecule on Nickel Cluster Ions, Nin+ (n = 3−11)

Abstract: The reactions of methanol on a size-selected nickel cluster ion, Ni n + (n = 3−11), were investigated at collision energies less than 1.0 eV in a beam-gas geometry. Dominant reactions were methanol chemisorption, demethanation, and carbide formation. The absolute cross sections of these different reactions were measured and found to change dramatically with the cluster size; the demethanation proceeds preferentially on Ni4 +, the carbide formation on Ni7,8 +, and the chemisorption on Ni6 +. A kinematic model … Show more

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Cited by 62 publications
(64 citation statements)
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“…11 The geometrical structure and the site of the chemisorbed CH 3 OH on Ni 4 + is almost the same as that of Ni 3 + as described above, but the electron density distributions of the Mulliken charges differ significantly. As shown in Figure 4, Ni 4 + (CH 3 OH) carries a higher negative charge on the O atom and positive charge on the H atom of the hydroxyl group than Ni 3 + (CH 3 OH) does.…”
Section: Relationship Between Chemisorbed Structure With Size-dependementioning
confidence: 70%
“…11 The geometrical structure and the site of the chemisorbed CH 3 OH on Ni 4 + is almost the same as that of Ni 3 + as described above, but the electron density distributions of the Mulliken charges differ significantly. As shown in Figure 4, Ni 4 + (CH 3 OH) carries a higher negative charge on the O atom and positive charge on the H atom of the hydroxyl group than Ni 3 + (CH 3 OH) does.…”
Section: Relationship Between Chemisorbed Structure With Size-dependementioning
confidence: 70%
“…The experimental apparatus used in the present study consists of a cluster ion source, a cooling cell, two quadrupole mass filters (QMFs), a reaction cell, and a detector, which are connected by octopole ion beam guides, and has been described in detail in our previous paper [30]. Briefly, bare metal cluster ions and their nitrides were produced by sputtering four separate metal targets (99.9% purity for vanadium, 99.8% for niobium) with accelerated 8.5-keV Xe + beams from the ion gun (CORDIS Ar25/35c, Rokion Ionenstrahl-Technologie) in the presence of a trace of nitrogen gas.…”
Section: Methodsmentioning
confidence: 99%
“…25 Clusters were produced by cosputtering four separate targets with accelerated xenon ion beams from the ion gun (CORDIS Ar25/35c, Rokion Ionenstrahl-Technologie). Here, three copper plates and one aluminum plate were used as targets.…”
Section: Methodsmentioning
confidence: 99%