Dynamic structural evolution of supported palladium-ceria core-shell catalysts revealed by in situ electron microscopy.

ABSTRACT: The exceptional activity for methane combustion of modular palladium-ceria core-shell subunits on silicon-functionalized alumina that was recently reported has created renewed interest in the potential of core-shell structures as catalysts. Here we report on our use of advanced ex situ and in situ electron microscopy with atomic resolution to show that the modular palladium-ceria core-shell subunits undergo structural evolution over a wide temperature range. In situ observations performed in an atmospheric gas cell within this temperature range provide real-time evidence that the palladium and ceria nanoparticle constituents of the palladium-ceria core-shell participate in a dynamical process that leads to the formation of an unanticipated structure comprised of an intimate mixture of pall

SUBMITTER: Zhang S 

PROVIDER: S-EPMC4510970 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature