Additionally, there is a decreasing trend in adsorption energies as the number of gold atoms increases, which may be related to what we will discuss later: for cationic gold oxide clusters and neutral gold oxide clusters, the adsorption energy of O 2 on them is proportional to the amount of positive charge on the Au atom of the -O-Au sites.
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Adsorption of O<sub>2</sub> on the Preferred -O-Au Sites of Small Gold Oxide Clusters: Charge-dependent Interaction and Activation.
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