Alternative title | Nanoscale structure of oxidized and reduced rhodium-loaded ZrO2–CeO2 catalysts |
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Download | - View final version: Nanoscale structure of oxidized and reduced rhodium-loaded ZrO₂–CeO₂ catalysts (PDF, 1.7 MiB)
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DOI | Resolve DOI: https://doi.org/10.1021/jp112272c |
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Author | Search for: Chen, Jian1; Search for: Jiang, Hongying; Search for: Qian, Hui1; Search for: Malac, Marek1 |
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Affiliation | - National Research Council of Canada. National Institute for Nanotechnology
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Format | Text, Article |
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Subject | ceria-zirconia; fine structures; nanoscale structure; particle reduction; reducing atmosphere |
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Abstract | Transmission electron microscopy (TEM) was used to investigate microstructure and chemistry of Rh-loaded ZrO₂-CeO2₂ catalyst exposed to oxidizing and two types of reducing atmospheres. In the oxidized sample Rh was dispersed on the ceria-zirconia support, while metallic Rh was precipitated in both H₂ and CO reduced samples. The size distribution of Rh particles in the H₂-reduced sample is narrower than in samples reduced in CO. Electron energy-loss spectroscopy (EELS) fine structure indicates that both Ce ⁴⁺ and Ce ³⁺ coexist in the oxidized sample while the reduced sample appears to be predominantly Ce ³⁺. We discuss the orientation relations of Rh and the ceria-zirconia support and the formation of superstructure in ceria-zirconia support in the reduced samples. We also briefly discuss the thermodynamics of the Rh particle reduction and on ordering in the yttrium/lanthanum-doped ceria-zirconia. |
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Publication date | 2011-06-17 |
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Publisher | American Chemical Society |
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In | |
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Language | English |
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Peer reviewed | Yes |
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NPARC number | 19734707 |
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Export citation | Export as RIS |
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Report a correction | Report a correction (opens in a new tab) |
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Record identifier | 9436bfec-dfec-40af-86fd-22c9f96a990f |
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Record created | 2012-04-19 |
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Record modified | 2020-05-27 |
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