cs7b00037_si_001.pdf (3.8 MB)
Synthesis of Supported Planar Iron Oxide Nanoparticles and Their Chemo- and Stereoselectivity for Hydrogenation of Alkynes
journal contribution
posted on 2017-04-26, 19:50 authored by María Tejeda-Serrano, Jose R. Cabrero-Antonino, Virginia Mainar-Ruiz, Miguel López-Haro, Juan C. Hernández-Garrido, José J. Calvino, Antonio Leyva-Pérez, Avelino CormaNature uses enzymes to dissociate
and transfer H2 by
combining Fe2+ and H+ acceptor/donor catalytic
active sites. Following a biomimetic approach, it is reported here
that very small planar Fe2,3+ oxide nanoparticles (2.0
± 0.5 nm) supported on slightly acidic inorganic oxides (nanocrystalline
TiO2, ZrO2, ZnO) act as bifunctional catalysts
to dissociate and transfer H2 to alkynes chemo- and stereoselectively.
This catalyst is synthesized by oxidative dispersion of Fe0 nanoparticles at the isoelectronic point of the support. The resulting
Fe2+,3+ 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.