40607-48-5Relevant articles and documents
The selective hydrogenation of furfural over intermetallic compounds with outstanding catalytic performance
Yang, Yusen,Chen, Lifang,Chen, Yudi,Liu, Wei,Feng, Haisong,Wang, Bin,Zhang, Xin,Wei, Min
supporting information, p. 5352 - 5362 (2019/10/11)
The selective hydrogenation of furfural (a biomass-derived platform compound, CO versus CC) is an important reaction for the production of chemical intermediates widely used in the polymer industry. Herein, we report three non-precious intermetallic compounds (IMCs) (Ni3Sn1, Ni3Sn2 and Ni3Sn4) derived from a layered double hydroxide (LDH) precursor, which are characterized by a highly uniform dispersion of IMC nanoparticles and display surprisingly improved catalytic performance toward the selective hydrogenation of furfural (CO) to furfuryl alcohol. In particular, the Ni3Sn2 IMC shows optimal catalytic behavior (conversion: 100%; selectivity: 99%), which exceeds that of reported non-precious metal catalysts and is even comparable to that of noble metal catalysts (e.g., Au, Pd and Pt). A combinative investigation based on in situ FT-IR, XANES and Bader charge studies verifies electron transfer from Sn to Ni, facilitating the activation of adsorption of the CO bond on the Ni top site, whilst inhibiting the adsorption of CC. Both experimental studies (in situ FT-IR and catalytic evaluations) and theoretical calculations (DFT calculations and microkinetic modeling) reveal a vertical adsorption configuration of furfural molecules over the Ni3Sn2 IMC, followed by the first hydrogenation at the carbon atom (the rate-determining step) and the second hydrogenation at the oxygen atom. This detailed study of the structure-selectivity relationship is substantiated by virtue of establishing the adsorption configuration of the substrate and the reaction pathway, which paves the way for the rational design and development of high-efficiency heterogeneous catalysts for selective hydrogenation reactions.
Hydrogenation of citral on activated carbon and high-surface-area graphite-supported ruthenium catalysts modified with iron
Bachiller-Baeza,Guerrero-Ruiz,Wang,Rodriguez-Ramos
, p. 450 - 459 (2007/10/03)
The hydrogenation of citral has been performed over Ru-Fe catalysts supported on activated carbon and on high-surface-area graphite. It was found that selectivity to unsaturated alcohols is independent of the carbonaceous support used for ruthenium catalysts. The addition of iron enhances selectivity to unsaturated alcohols (geraniol and nerol) in a manner similar for both ruthenium catalysts, becoming maximum for the highest iron loading. Calorimetric experiments give some evidence about alloy formation in ruthenium catalysts promoted with iron. It is inferred that the surface polarity of the alloyed particles promotes the selective hydrogenation of citral toward unsaturated alcohols.
