Enhanced Stability of Gold Clusters Supported on Hydroxylated MgO(001) Surfaces

摘要

While the microscopic details of CO oxidation over oxide-supported Au clusters remain debated in the literature, there exists general agreement that the size of the particles substantially affects catalytic performance. Au clusters less than 5 nm in diameter are needed for high catalytic activity in CO oxidation. Sintering of Au clusters caused by thermal pretreatment or during reaction is a common cause in the loss of catalytic activity.