EXTRACRYSTALLINE SITING OF RUTHENIUM- DIOXIDE NANOPARTICLES ON NaY ZEOLITES: EFFECTIVE, ATOM-EFFICIENT DISPERSED ELECTROCATALYTIC NANOELECTRODES

摘要

Our previous work demonstrated that microporous zeolites modified with metallically conductive Pt nanoparticles behave as ensembles of oxide-supported nanoelectrodes when electrified in neat solvents. Within the volume of such microheterogeneous dispersions, the slurried micrometer-sized aluminosilicate crystals provide a high degree of ionicity and act as solid-state electrolytes in aqueous, organic, and two-phase solvent systems, especially as the size of the supported conductive modifying particle drops below 5 nm. Even though the bulk of the Pt nanoparticles are intracrystalline and do not participate in direct electrolysis, the minor fraction of extracryalline-sited Pt provide an effective, high-surface- area dispersed electrode.