Confining the Nucleation of Pt to In Situ Form (Pt-Enriched Cage)@CeO<sub>2</sub> Core@Shell Nanostructure as Excellent Catalysts for Hydrogenation Reactions.
basic_science · Level V
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- Record sourced from PubMed, PMID 28585246.
- Also identified by DOI 10.1002/adma.201700495.
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Abstract
Ultrathin (Pt-enriched cage)@CeO<sub>2</sub> core@shell nanostructures are successfully fabricated via a facile hard-template method. It is found that the usage of Pd@Ag@CeO<sub>2</sub> bi-metallic core@shell nanostructure as the hard template plays an important role in avoiding the independent nucleation of Pt metal during the galvanic replacement process between K<sub>2</sub> PtCl<sub>4</sub> and Ag components. This unique core@shell samples show extraordinary activity and selectivity for the cinnamaldehyde hydrogenation reaction. It can achieve over 95% conversion with 87% selectivity of hydrocinnamaldehyde in 5 h under 1 atm H<sub>2</sub> pressure. It is considered that such high catalytic performance could be attributed to the densely CeO<sub>2</sub> -coated core@shell hybrid form as well as the ultrathin nature of the Pt-enriched cage.