Surface termination and subsurface restructuring of perovskite-based solid oxide electrode materials

J. Druce; H. Téllez; M. Burriel; M. D. Sharp; L. J. Fawcett; S. N. Cook; D. S. McPhail; T. Ishihara; H. H. Brongersma; J. A. Kilner

doi:10.1039/C4EE01497A

Surface termination and subsurface restructuring of perovskite-based solid oxide electrode materials†

J. Druce,‡*^a H. Téllez,§‡*^b M. Burriel,¶^b M. D. Sharp,^b L. J. Fawcett,^b S. N. Cook,||^b D. S. McPhail,^b T. Ishihara,^a H. H. Brongersma^c and J. A. Kilner*^ab

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^a International Institute for Carbon Neutral Energy Research (wpi-I2CNER), Kyushu University, Nishi-ku, Fukuoka, Japan
E-mail: john.druce@i2cner.kyushu-u.ac.jp, htellez@i2cner.kyushu-u.ac.jp, j.kilner@imperial.ac.uk
Tel: +81-92-802-6738

^b Department of Materials, Imperial College London, South Kensington, London, UK

^c Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

Abstract

We study the outer atomic surfaces of a series of perovskite-based ceramics using low energy ion scattering spectroscopy. After high temperature treatment, segregated A-site (or acceptor substituent) cations dominate the outer surfaces with no B-site cations detected. We also find evidence of an associated B-cation enriched region below the surface.

Energy & Environmental Science

Surface termination and subsurface restructuring of perovskite-based solid oxide electrode materials†

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Surface termination and subsurface restructuring of perovskite-based solid oxide electrode materials

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