Gold-based mono- and bimetallic nanoparticles on HY zeolites

摘要

Stable nanoparticles of monometallic gold, or bimetallic Pd-Au and Pt-Au systems supported onrnY-zeolite are obtained by an original method, in which the metallic precursors and the support playrnan important part in the formation and the stability of the particles. This method involves exchange ofrncomplexed cations with counter-ions of an acidified zeolite and their thermal reduction by the ligandrn(ethylenediamine) under inert gas flow. This preparation leads to nanometric mixed bimetallicrnparticles. The particles have good stability at high temperature (500℃) in dihydrogen or dioxygen.