Using microwave irradiation, PtCo alloy nanoparticles were deposited within a few minutes on COOH-functionalized MWCNT supports. The obtained catalysts were used for selective hydrogenation of cinnamaldehyde, a reaction whose products are widely used in various fields. In the selective cinnamaldehyde hydrogenation to cinnamyl alcohol, microwave-prepared catalysts (generically, PtxCoy-MW) outperformed a catalyst prepared by the conventional method (Pt1Co2-con). The highest selective hydrogenation to cinnamyl alcohol, 89%, was obtained using Pt1Co2-MW, while Pt1Co2-con showed a selectivity of 76%. Characterization results confirmed that the microwave prepared samples had a stronger interaction between Pt and Co than that in the Pt1Co2-con sample. The alloyed Co altered the electronic structure of Pt, leading to favorable adsorption of the C=O bond by the lone-pair electrons of its oxygen atom. Moreover, the Pt1Co2-MW sample showed neglectable change in catalytic performance (e. g., cinnamaldehyde conversion and selective hydrogenation to cinnamyl alcohol) during recycling experiments.
K. Wang et al., "PtCo/MWCNTs Prepared By A Microwave-assisted Polyol Method For Selective Cinnamaldehyde Hydrogenation," ChemNanoMat, Wiley, Jan 2023.
The definitive version is available at https://doi.org/10.1002/cnma.202300294
Chemical and Biochemical Engineering
Keywords and Phrases
Cinnamaldehyde hydrogenation; High selectivity; High stability; microwave; PtCo alloy
International Standard Serial Number (ISSN)
Article - Journal
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01 Jan 2023