Abstract
Highly porous, low density palladium nanoparticle/clay aerogel materials have been produced and demonstrated to possess significant catalytic activity for olefin hydrogenation and isomerization reactions at low/ambient pressures. This technology opens up a new route for the production of catalytic materials.
Highlights
Owing to their high surface area to volume ratios and associated optimal utilization of precious metals required to carry out catalytic transformations, supported nanoscale metal particles are finding great interest as catalysts for organic synthesis [1,2,3,4], as well as in electrodes for proton exchange membrane fuel cells [5,6]
We report the use of a metal nanoparticle/clay aerogel as a heterogeneous catalyst
Clay gelsglycol are stabilized by ionic interactions in between clay layers; the presence of palladium nanoparticles appear to to mask this charge preventfor a stable adapted from other workers, but used by our group produce
Summary
Owing to their high surface area to volume ratios and associated optimal utilization of precious metals required to carry out catalytic transformations, supported nanoscale metal particles are finding great interest as catalysts for organic synthesis [1,2,3,4], as well as in electrodes for proton exchange membrane fuel cells [5,6]. The ease of use of bio-based polymers as binders for the clay skeletons, and the inherently low flammability of these materials without the addition of any flame retardants render these materials to be sustainable [14,15,16,17] Because of their inherent ability to be converted into ceramic materials, clay-based aerogels can be processed into desired macroscopic geometries, thermally treated to produced durable, porous ceramic catalysts with inherently low pressure drops, high surface areas, and relatively high metal loadings. We are only familiar with one other reference in this area [18] These catalysts were produced by preparing nanoscale palladium particles, supported on sodium montmorillonite clay (Na-MMT) followed by conversion of the metal/clay into aerogel structures. While gels of montmorillonite can be formed at 2 wt % in water with pristine clay, the
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