Abstract
Developing highly active and stable catalysts is still extremely desirable, but represents a great challenge. Herein, we report a feasible one-pot approach to prepare in large scale Au core)/CeO2–(Au nanoclusters) (denoted as Au/CeO2–Au) nanostructures through a spontaneous chemical redox reaction without any surfactants, in which the Au nanoclusters were embedded into stacked CeO2. Such special architecture can offer abundant exposed Au atoms and oxygen vacancies, provide much more CeO2–Au interfaces, ensure the effective transfer of reactants and have clean exposed atoms. The Au/CeO2–Au nanostructures therefore exhibit a significantly improved activity of 100 % CO conversion at a much lower temperature of 115 °C compared with their counterparty. More importantly, the Au nanoclusters are spatially confined into CeO2, hindering the aggregation or further growth during catalysis. The conversion is therefore still kept at 100 % without any decay even the reaction was performed for as long as 300 h (12.5 days) and 20 cycles. We believed that this work is a new pathway to design effective catalysts with high activity and stability, especially for that involves small-sized metal nanoclusters.
Published Version
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