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Chemoselective Transfer Hydrogenation of Cinnamaldehyde over Activated Charcoal Supported Pt/Fe3O4 Catalyst
Chen Chun
Author NameAffiliationE-mail
Chen Chun Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, China chenchun2013@issp.ac.cn 
Abstract:
A variety of spherical and structured activated charcoal supported Pt/Fe3O4 composites with an average particle size of ~100 nm have been synthesized by a self-assembly method using the difference of reduction potential between Pt and Fe3O4 nanocrystallites as driving force. The formed Fe3O4 nanoparticles effectively refrains the aggregation of Pt nanocrystallites and promotes the dispersion of Pt nanoparticles on the surface of catalyst, favorable for the exposure of Pt active sites for high-efficient adsorption and contact of substrate and hydrogen donor. The electron-enrichment state of Pt nanoparticles donated by Fe3O4 nanocrystallites is corroborated by XPS measurement, which is responsible for promoting and activating the terminal C=O bond of adsorbed substrate via a vertical configuration. The experimental results show that the activated charcoal supported Pt/Fe3O4 catalyst exhibits a 94.8% selectivity towards cinnamyl alcohol by the transfer hydrogenation of cinnamaldehyde with Pt loading of 2.46% under the optimum conditions of 120°C for 6 h, and 2-propanol as a hydrogen donor. Additionally, the present study demonstrates that a high-efficient and recyclable catalyst can be rapidly separated from the mixture due to its natural magnetism upon the application of magnetic field.
Key words:  Activated charcoal supported Pt/Fe3O4 catalysts,Redox method,Transfer hydrogenation Cinnamaldehyde,Cinnamyl alcohol
FundProject:
Chemoselective Transfer Hydrogenation of Cinnamaldehyde over Activated Charcoal Supported Pt/Fe3O4 Catalyst
陈春
摘要:
A variety of spherical and structured activated charcoal supported Pt/Fe3O4 composites with an average particle size of ~100 nm have been synthesized by a self-assembly method using the difference of reduction potential between Pt and Fe3O4 nanocrystallites as driving force. The formed Fe3O4 nanoparticles effectively refrains the aggregation of Pt nanocrystallites and promotes the dispersion of Pt nanoparticles on the surface of catalyst, favorable for the exposure of Pt active sites for high-efficient adsorption and contact of substrate and hydrogen donor. The electron-enrichment state of Pt nanoparticles donated by Fe3O4 nanocrystallites is corroborated by XPS measurement, which is responsible for promoting and activating the terminal C=O bond of adsorbed substrate via a vertical configuration. The experimental results show that the activated charcoal supported Pt/Fe3O4 catalyst exhibits a 94.8% selectivity towards cinnamyl alcohol by the transfer hydrogenation of cinnamaldehyde with Pt loading of 2.46% under the optimum conditions of 120°C for 6 h, and 2-propanol as a hydrogen donor. Additionally, the present study demonstrates that a high-efficient and recyclable catalyst can be rapidly separated from the mixture due to its natural magnetism upon the application of magnetic field.
关键词:  Activated charcoal supported Pt/Fe3O4 catalysts,Redox method,Transfer hydrogenation Cinnamaldehyde,Cinnamyl alcohol
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