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Volume 122, Issue 5, 01 February 2005
Chemisorption sites of CO on small gold clusters and transitions from chemisorption to physisorption122(2005); http://dx.doi.org/10.1063/1.1850091View Description Hide Description
Gold clusters adsorbed with CO, were studied by photoelectron spectroscopy (PES). The first few CO adsorptions were observed to induce significant redshifts to the PES spectra relative to pure gold clusters. For each Au cluster, a critical CO number was observed, beyond which the PES spectra of change very little with increasing n. was shown to correspond exactly to the available low coordination apex sites in each Au cluster. CO first chemisorbs to these sites and additional CO then only physisorbs to the chemisorption-sautrated complexes.