In Situ and Simultaneous Observation of Palladium Redox and Oxygen Storage/Release in Pd/Sr-Fe-O Perovskite Catalysts Using Dispersive XAFS
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- Kimura Masao
- Advanced Technology Research Laboratories, Nippon Steel Corporation
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- Niwa Yasuhiro
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)
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- Uemura Kenichi
- Advanced Technology Research Laboratories, Nippon Steel Corporation
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- Nagai Toru
- Advanced Technology Research Laboratories, Nippon Steel Corporation
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- Inada Yasuhiro
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)
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- Nomura Masaharu
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)
書誌事項
- タイトル別名
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- <i>In Situ</i> and Simultaneous Observation of Palladium Redox and Oxygen Storage/Release in Pd/Sr–Fe–O Perovskite Catalysts Using Dispersive XAFS
- <i>In Situ</i> and Simultaneous Observation of Palladium Redox and Oxygen Storage/Release in Pd/Sr–Fe–O Perovskite Catalysts Using Dispersive XAFS
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We have succeeded in in situ and simultaneously observing the redox reaction of palladium and the oxygen storage/release process in a newly developed palladium-promoted Sr–Fe–O (Pd/Sr–Fe–O) catalyst during redox-gas cycles using dispersive X-ray absorption fine structure (XAFS) analysis at 673 K with a time resolution of less than 20 ms. The Pd/Sr–Fe–O catalyst, which exhibits high performance for automotive emission control, has a unique “multi-phase-domain” structure, where a single grain is composed of nano-sized domains of three phases: SrFeO3−δ, Sr4Fe6O13−δ and SrFe12O19−δ. In situ observation has shown a strong correlation between the redox of the palladium and the oxygen storage/release in the Pd/Sr–Fe–O catalyst, and the correlation factors differ between the reduction and oxidation reactions. The oxide phases exhibit a type of “oxygen buffer” effect in the oxidation cycle and delay the formation of Pd–O, resulting in the high performance of the catalyst.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 54 (2), 246-254, 2013
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679225652992
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- NII論文ID
- 10031144489
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BC3sXltVKqtLY%3D
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 024231931
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可