Adsorption of C{sub 60} on nickel clusters at high temperature

Journal Article · Sat May 01 04:00:00 EDT 1999 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.59.13431· OSTI ID:341392

Parks, E K; Kerns, K P; Riley, S J ^[1]; Winter, B J ^[2]

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1. Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Max-Born-Institut fuer Nichtlineare Optik und Kurzzeitspektroskopie, Rudower Chaussee 6, D-12489 Berlin (Germany)

The adsorption of C{sub 60} on nickel clusters has been studied in a flow-tube reactor at temperatures between 823 and 1073 K. Saturation coverages of C{sub 60} have been determined for Ni{sub 2}{endash}Ni{sub 72} and show a size dependence consistent with C{sub 60} adsorption on essentially spherical Ni{sub n} clusters. There is no evidence for C{sub 60} decomposition. The configuration of the adsorbed C{sub 60} molecules appears to change from tetrahedral{r_arrow}octahedral{r_arrow}cubic{r_arrow}less symmetrical arrangements as metal cluster size increases. An RRK modeling of the first C{sub 60} that binds to the nickel clusters yields a binding energy in excess of 2.06 eV. The binding energy appears to decrease with decreasing metal nuclearity of the binding site, with binding to atop sites on the Ni{sub n} clusters being relatively weak. It is argued that electron transfer to the C{sub 60} ligands is limited by charging of the central Ni{sub n} core and that this may provide a way of controlling the extent of electron transfer to the adsorbed molecules. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 341392
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 20 Vol. 59; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ADSORPTION
ATOMIC CLUSTERS
BINDING ENERGY
ELECTRON TRANSFER
FULLERENES
NICKEL
TEMPERATURE RANGE 0400-1000 K