Chemoselective Transfer Hydrogenation of Cinnamaldehyde over Activated Charcoal Supported Pt/Fe3O4 Catalyst
活性炭负载Pt／Fe3O4催化剂及其选择性转移加氢肉桂醛的催化性能作者机构：中国科学院吲体物理研究所环境与能源纳米材料中心材料物理重点实验室合肥230031 中国科学技术大学研究生院科学岛分院合肥230026 格林菲斯大学黄金海岸校区清洁环境与能源中心亚昆士兰4222
出 版 物：《Chinese Journal of Chemical Physics》 (化学物理学报（英文）)
年 卷 期：2017年第30卷第4期
页 面：467-473,I0002页
核心收录：
学科分类：07[理学] 0703[理学-化学] 0702[理学-物理学]
基 金：This work is supported by the National Natural Science Foundation of China (No.51372248 No.51432009 and No.51502297) Instrument Developing Project of the Chinese Academy of Sciences (No.yz201421) the CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences China
主 题：Activated charcoal supported Pt/Fe3O4 catalysts Redox method Transfer hydrogenation Cinnamaldehyde Cinnamyl alcohol
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 （Ⅳ） and Fe （Ⅱ） precursors as driving force. The formed Fe3O4 nanoparticles （NPs） effectively prevent the aggregation of Pt nanocrystallites and promote the dispersion of Pt NPs on the surface of catalyst, which will be 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 NPs donated by Fe304 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 94.8% selectivity towards cinnamyl alcohol by the transfer hydrogenation of einnamaldehyde with Pt loading of 2.46% under the optimum conditions of 120 ℃ 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.
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