| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 52356 | Catalysis Communications | 2008 | 4 Pages |
Abstract
In the LaFePdO3 perovskite catalyst, redox fluctuations of the exhaust gas suppress the growth of particles of precious metal by causing Pd to move in and out of the perovskite crystal. To observe the real movements of Pd directly, the time evolution of local structure around Pd by redox fluctuations was investigated by in situ energy-dispersive X-ray absorption fine-structure (DXAFS) analysis with a 10 ms resolution. We proved that the change in structure of Pd is sufficiently fast to respond to the control frequency (1–4 Hz) of an actual gasoline engine and that the Pd particles that segregate out are extremely fine.
Related Topics
Physical Sciences and Engineering
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Catalysis
Authors
Mari Uenishi, Hirohisa Tanaka, Masashi Taniguchi, Isao Tan, Yasuo Nishihata, Jun’ichiro Mizuki, Tetsuhiko Kobayashi,