Due to tunable redox properties and cost-effectiveness, copper-ceria (Cu-CeO ) materials have been investigated for a wide scope of catalytic reactions. However, accurately identifying and rationally tuning the local structures in Cu-CeO have remained challenging, especially for nanomaterials with inherent structural complexities involving surfaces, interfaces, and defects. Here, a nanocrystal-based atom-trapping strategy to access atomically precise Cu-CeO nanostructures for enhanced catalysis is reported. Driven by the interfacial interactions between the presynthesized Cu and CeO nanocrystals, Cu atoms migrate and redisperse onto the CeO surface via a solid-solid route. This interfacial restructuring behavior facilitates tuning of the copper dispersion and the associated creation of surface oxygen defects on CeO , which gives rise to enhanced activities and stabilities catalyzing water-gas shift reaction. Combining soft and solid-state chemistry of colloidal nanocrystals provide a well-defined platform to understand, elucidate, and harness metal-support interactions. The dynamic behavior of the supported metal species can be further exploited to realize exquisite control and rational design of multicomponent nanocatalysts.
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| http://dx.doi.org/10.1002/advs.202104749 | DOI Listing |
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