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Updated: Apr 20, 2026

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
Published on: June 16, 2014
Oxidative decomposition of Au25(SR)18 clusters in a catalytic context
Timothy A Dreier1, O Andrea Wong, Christopher J Ackerson
1Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA. ackerson@colostate.edu.
Abstract:
Gold nanoparticle catalysis of chemical transformations has emerged as a subject of intense interest over the past decade. In particular, Au25(SR)18 has emerged as a model catalyst. In an effort to investigate their potential as intact, homogeneous, unsupported catalysts, we have discovered that Au25(SR)18 clusters are not stable in oxidizing conditions reported for catalytic styrene oxidation. Further investigation suggests that the active catalytic species is an Au(I) species resulting from oxidative decomposition of the starting gold cluster. This conclusion appears independent of R-group on thiolate-ligated Au25(SR)18 clusters.
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