1 research outputs found
Fabrication of Magnetically Recoverable Catalysts Based on Mixtures of Pd and Iron Oxide Nanoparticles for Hydrogenation of Alkyne Alcohols
We report a novel method for development
of magnetically recoverable catalysts prepared by thermal decomposition
of palladium acetylacetonate in the presence of iron oxide nanoparticles
(NPs). Depending on conditions, the reaction results either in a dispersed
mixture of Pd and iron oxide NPs or in their aggregates. It was demonstrated
that the Pd loading, reaction temperature, solvent, and iron oxide
NP size and composition are crucial to control the reaction product
including the degree of aggregation of Pd and iron oxide NPs, and
the catalyst properties. The aggregation controlled by polarization
and magnetic forces allows faster magnetic separation, yet the aggregate
sizes do not exceed a few hundred nanometers, making them suitable
for various catalytic applications. These NP mixtures were studied
in a selective hydrogenation of 2-methyl-3-butyn-2-ol to 2-methyl-3-buten-2-ol,
demonstrating clear differences in catalytic behavior depending on
the catalyst structure. In addition, one of the catalysts was also
tested in hydrogenation of 3-methyl-1-pentyn-3-ol and 3-methyl-1-nonyn-3-ol,
indicating some specificity of the catalyst toward different alkyne
alcohols