Energy resolved XPS depth profile of (IrO2, RuO2, Sb2O5, SnO2) electrocatalyst powder to reveal core-shell nanoparticle structure
Synchrotron‐based energy resolved XPS was used to characterize the structure of IrO2RuO2‐coated Sb2O5SnO2 nanoparticles. Samples were heat treated at 300, 350, 400, 450 and 500 °C after chloride Ir and Ru precursors were added to Sb2O5SnO2. Photoelectron kinetic energies of 100, 350 and 1400 eV w...
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Published in | Surface and interface analysis Vol. 43; no. 5; pp. 847 - 855 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Chichester, UK
John Wiley & Sons, Ltd
01.05.2011
Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | Synchrotron‐based energy resolved XPS was used to characterize the structure of IrO2RuO2‐coated Sb2O5SnO2 nanoparticles. Samples were heat treated at 300, 350, 400, 450 and 500 °C after chloride Ir and Ru precursors were added to Sb2O5SnO2. Photoelectron kinetic energies of 100, 350 and 1400 eV were employed to obtain an indication of the depth of elemental distributions and chemical shifts. It was shown that the electrocatalyst consists of a core of Sb2O5SnO2 enriched with Sb2O5 towards the surface, with a shell of IrO2RuO2 deposited on this core, and an outer layer of Sb2O5SnO2 over this shell. No significant chemical interaction occurs between IrO2RuO2 and Sb2O5SnO2. The energy resolved XPS depth profile technique is effective for studying core‐shell materials. Copyright © 2010 John Wiley & Sons, Ltd. |
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Bibliography: | ark:/67375/WNG-RF9Z4DM7-7 ArticleID:SIA3644 istex:976D98BCBD67A3F851E8AEF7F6FC18D95BC415D5 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0142-2421 1096-9918 1096-9918 |
DOI: | 10.1002/sia.3644 |