1 research outputs found
Synthesis of Supported Planar Iron Oxide Nanoparticles and Their Chemo- and Stereoselectivity for Hydrogenation of Alkynes
Nature uses enzymes to dissociate
and transfer H<sub>2</sub> by
combining Fe<sup>2+</sup> and H<sup>+</sup> acceptor/donor catalytic
active sites. Following a biomimetic approach, it is reported here
that very small planar Fe<sup>2,3+</sup> oxide nanoparticles (2.0
Ā± 0.5 nm) supported on slightly acidic inorganic oxides (nanocrystalline
TiO<sub>2</sub>, ZrO<sub>2</sub>, ZnO) act as bifunctional catalysts
to dissociate and transfer H<sub>2</sub> to alkynes chemo- and stereoselectively.
This catalyst is synthesized by oxidative dispersion of Fe<sup>0</sup> nanoparticles at the isoelectronic point of the support. The resulting
Fe<sup>2+,3+</sup> solid catalyzes not only, in batch, the semihydrogenation
of different alkynes with good yields but also the removal of acetylene
from ethylene streams with >99.9% conversion and selectivity. These
efficient and robust non-noble-metal catalysts, alternative to existing
industrial technologies based on Pd, constitute a step forward toward
the design of fully sustainable and nontoxic selective hydrogenation
solid catalysts