Effect of CeO2 Addition on the Change of Crystal Structure of PdO Supported on .CHI.-Al2O3 under the Methane Atmosphere
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- LI Wei Bing
- Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
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- MURAKAMI Yuichiro
- Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
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- ORIHARA Masanao
- Okura Industrial Co., Ltd.
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- KANAOKA Kunio
- Okura Industrial Co., Ltd.
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- TANAKA Suminori
- Okura Industrial Co., Ltd.
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- MURAI Kei-ichiro
- Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
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- MORIGA Toshihiro
- Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
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- KANEZAKI Eiji
- Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
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- NAKABAYASHI Ichiro
- Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
Bibliographic Information
- Other Title
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- メタン雰囲気下におけるχ-Al2O3に担持したPdOの結晶構造に及ぼすCeO2添加の影響
- メタン雰囲気下におけるx-Al2O3に坦持したPdOの結晶構造に及ぼすCeO2添加の影響
- メタン フンイキ カ ニ オケル x Al2O3 ニ タンジシタ PdO ノ ケッショウ コウゾウ ニ オヨボス CeO2 テンカ ノ エイキョウ
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Description
The effect of CeO2 additions into a PdO catalyst supported on χ-Al2O3 has been investigated. Changes in crystal structure have been examined in a methane atmosphere, in relation to catalytic activity for methane oxidation. The mass ratio Al2O3/PdO of the catalysts was kept constant at a value of 9, whereas the atomic ratio R=Pd/Ce was set to 0, 1, 2 and 5. The PdO-CeO2/χ-Al2O3 catalyst with R=1 showed the best catalytic activity in methane oxidation. When the catalyst was heated at 300°C, Pd metal appeared under the O2-deficient atmosphere, whereas PdO was reformed when the reduced catalyst was heated at 300°C in an atmosphere with an O2-excess. Line broadening of X-ray diffraction patterns was detected for both the (110) plane of PdO and the (200) plane of the Pd formed after heating, suggesting that stacking faults were introduced into these planes by the loss of oxygens in the PdO/Pd lattice during the reaction with methane. As the (110) planes in PdO correspond to the (200) planes of the fcc Pd metal formed during reaction, in terms of the array of the constituent metal only, methane oxidation would easily proceed by way of these oxygen-deficient lattice planes.<br>
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 112 (1303), 149-152, 2004
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390282680226269952
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- NII Article ID
- 110002288181
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- NII Book ID
- AN10040326
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- ISSN
- 18821022
- 09145400
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- NDL BIB ID
- 6874814
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed