Highly Active and Sinter-Resistant Pd-Nanoparticle Catalysts Encapsulated in Silica


  • This work was supported by the U.S. Department of Energy, (Basic Energy Sciences grant DE-FG02-89ER14048) and a Korea Research Foundation Grant funded by the Korean Government (KRF-2006-352-D00044). UCSB Materials Research Laboratory Central Facilities were funded by National Science Foundation Award # DMR00-80034. A.J.F. thanks the United States Environmental Protection Agency (EPA) under the Science to Achieve Results (STAR) Graduate Fellowship Program for three years of generous support. EPA has not officially endorsed this publication and the views expressed herein may not reflect the views of the EPA.


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Pd nanoparticles are synthesized in spherical SiO2 shells (see image), and their catalytic activity for CO oxidation and acetylene hydrogenation is investigated. The activity is observed to be significantly improved compared to traditional supported Pd catalysts, and it is found that the Pd@SiO2 particles are far more resistant to sintering than control samples of Pd supported on silica spheres.