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Perovskite BaCeO3 as a New Redox Host for Catalytic Pd Nanoparticles

Published online by Cambridge University Press:  26 February 2011

Jun Li  and
Ram Seshadri
Jun Li
Affiliation:
junli@mrl.ucsb.edu, University of California, Santa Barbara, Materials Research Laboratory, Room 2228, MRL, UC Santa Barbara, Santa Barbara, CA, 93106, United States, 805-893-7932
Ram Seshadri
Affiliation:
seshadri@mrl.ucsb.edu, University of California, Materials Research Laboratory, Santa Barbara, CA, 93106, United States
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Abstract

We have examined the ability of a carefully chosen perovskite, BaCeO3, to act as a redox host for noble metals, notably Pd, in the hope of producing an “intelligent” catalyst where palladium is absorbed into the host lattice as ions under oxidative conditions and released as elemental Pd under reducing conditions. Pd-substituted perovskites BaCe1-xPdxO3-δ (0 ≤ x ≤ 0.1) were prepared by solid-state reactions in pure oxygen. The crystal structure was refined in the orthorhombic space group Pnma. Palladium was found to be driven in and out of the perovskite lattice upon repeated redox cycles by detailed XRD study. SEM/EDX revealed the formation of perovskite nanowires and nanorods when reducing Pd-substituted BaCeO3 up to 1000°C.

Keywords

nanostructurePdcatalytic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 988: Symposium QQ – Solid-State Chemistry of Inorganic Materials VI , 2006 , 0988-QQ09-10
Copyright
Copyright © Materials Research Society 2007

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