Abstract
Selective hydrogenation of α,β-unsaturated aldehyde catalyzed by supported Pd nanoparticles (NPs) is challenging, especially under harsh reaction conditions. Here, we report a facile method to prepare a catalyst composed of highly dispersed Pd NPs (∼2.6 nm) confined in zeolite ZSM-5 crystals. When used in the hydrogenation of cinnamaldehyde, the prepared catalyst (Pd@SG-ZSM-5) exhibited excellent performance for the selective production of hydrocinnamaldehyde (HCAL) due to the confinement effect. Compared with the traditional supported Pd catalyst prepared by impregnation, Pd@SG-ZSM-5 showed a 2.5-fold enhancement in the HCAL selectivity (73% vs. 30%). Liquid adsorption combined with infrared spectroscopy characterization revealed that compared with the traditional catalyst, Pd@SG-ZSM-5 adsorbed much less reactant as well as product molecules and desorbed the generated HCAL quickly, thereby suppressing the formation of by-products and leading to high selectivity of HCAL.
Original language | English (US) |
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Pages (from-to) | 111566 |
Journal | Microporous and Mesoporous Materials |
DOIs | |
State | Published - Nov 16 2021 |
Bibliographical note
KAUST Repository Item: Exported on 2021-11-26Acknowledgements: J. W. acknowledges the financial support from the National Natural Science Foundation of China (21902016) and Fundamental Research Funds for the Central Universities (2019CDQYHG026).
ASJC Scopus subject areas
- Mechanics of Materials
- General Materials Science
- General Chemistry
- Condensed Matter Physics