Abstract
The carbon monoxide (CO) adsorption activity of small gold-cluster anions (AuN-, N = 4-19) has been measured by pulsed helium flow-reactor methods at room temperature. In contrast to other metals, the reaction-product distributions, AuN(CO)M = (N,M), measured over a range of CO partial pressure, reveal highly size-dependent adsorption activity and saturation. Preferred initial products include the (N,M) set {(5,1), (11,1), (15,1), (15,2)}, which can be explained by the gold electron (sub)shell fillings at 8, 14, 18, and 20 electrons, respectively, assuming CO acts as a two-electron donor. Pronounced saturation compositions include the complexes {(7,4), (9,6), (11,6), (13,6)}. The pressure-dependent adsorption patterns give insight into (CO,O2) coadsorption phenomena on model-catalyst systems, and may be exploited in further gas-phase experiments on coadsorption and catalytic cycles.
Original language | English (US) |
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Pages (from-to) | 10964-10968 |
Number of pages | 5 |
Journal | Journal of Physical Chemistry B |
Volume | 104 |
Issue number | 47 |
DOIs | |
State | Published - Nov 2000 |
Externally published | Yes |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry