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- Title
Nanocrystal bilayer for tandem catalysis.
- Authors
Yamada, Yusuke; Chia-Kuang Tsung; Wenyu Huang; Ziyang Huo; Habas, Susan E.; Soejima, Tetsuro; Aliaga, Cesar E; Somorjai, Gabor A.; Peidong Yang
- Abstract
Supported catalysts are widely used in industry and can be optimized by tuning the composition and interface of the metal nanoparticles and oxide supports. Rational design of metal-metal oxide interfaces in nanostructured catalysts is critical to achieve better reaction activities and selectivities. We introduce here a new class of nanocrystal tandem catalysts that have multiple metal-metal oxide interfaces for the catalysis of sequential reactions. We utilized a nanocrystal bilayer structure formed by assembling platinum and cerium oxide nanocube monolayers of less than 10 nm on a silica substrate. The two distinct metal-metal oxide interfaces, CeO2-Pt and Pt-SiO2, can be used to catalyse two distinct sequential reactions. The CeO2-Pt interface catalysed methanol decomposition to produce CO and H2, which were subsequently used for ethylene hydroformylation catalysed by the nearby Pt-SiO2 interface. Consequently, propanal was produced selectively from methanol and ethylene on the nanocrystal bilayer tandem catalyst. This new concept of nanocrystal tandem catalysis represents a powerful approach towards designing high-performance, multifunctional nanostructured catalysts.
- Subjects
NANOCRYSTALS; CATALYST supports; METAL catalysts; METHANOL; ETHYLENE; PLATINUM; CERIUM oxides; HYDROFORMYLATION; SILICA
- Publication
Nature Chemistry, 2011, Vol 3, Issue 5, p372
- ISSN
1755-4330
- Publication type
Article
- DOI
10.1038/nchem.1018