AI Article Synopsis
- Aberration-corrected transmission electron microscopy provided insights into atomic-scale processes in Pd-LaFeO(3) catalysts.
- Evidence showed that palladium (Pd) diffused into LaFeO(3) under high-temperature oxidizing conditions and out of LaFe(0.95)Pd(0.05)O(3-δ) in reducing conditions.
- However, the limited extent of this diffusion raises questions about its significance in the proposed self-regeneration mechanism for automotive exhaust-gas catalysis.
Article Abstract
Aberration-corrected transmission electron microscopy was used to study atomic-scale processes in Pd-LaFeO(3) catalysts. Clear evidence for diffusion of Pd into LaFeO(3) and out of LaFe(0.95)Pd(0.05)O(3-δ) under high-temperature oxidizing and reducing conditions, respectively, was found, but the extent to which these processes occurred was quite limited. These observations cast doubt that such phenomena play a significant role in a postulated mechanism of self-regeneration of this system as an automotive exhaust-gas catalyst.
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| http://dx.doi.org/10.1021/ja2082284 | DOI Listing |
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