Photochemical route for synthesizing atomically dispersed palladium catalysts
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Abstract
Atomically dispersed noble metal catalysts often exhibit high catalytic performances, but the metal loading density must be kept low (usually below 0.5%) to avoid the formation of metal nanoparticles through sintering. We report a photochemical strategy to fabricate a stable atomically dispersed palladium-titanium oxide catalyst (Pd1/TiO2) on ethylene glycolate (EG)-stabilized ultrathin TiO2 nanosheets containing Pd up to 1.5%. The Pd1/TiO2 catalyst exhibited high catalytic activity in hydrogenation of C=C bonds, exceeding that of surface Pd atoms on commercial Pd catalysts by a factor of 9. No decay in the activity was observed for 20 cycles. More important, the Pd1/TiO2-EG system could activate H2 in a heterolytic pathway, leading to a catalytic enhancement in hydrogenation of aldehydes by a factor of more than 55.
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The record
- Venue
- Science
- Topic
- Catalytic Processes in Materials Science
- Field
- Materials Science
- Canadian institutions
- Dalhousie University
- Funders
- Ministry of Science and Technology of the People's Republic of ChinaNatural Sciences and Engineering Research Council of CanadaNational Natural Science Foundation of China
- Keywords
- PalladiumCatalysisPhotochemistryMaterials scienceNanotechnologyChemistryOrganic chemistry
- Has abstract in OpenAlex
- yes