PdZn=Cu : Can an Intermetallic Compound Replace an Element?(Cross-disciplinary Physics and Related Areas of Science and Technology)
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概要
- 論文の詳細を見る
An intermetallic compound, PdZn, exhibits a similar valence electron density of states as pure Cu, which has been confirmed by energy band calculation and X-ray photoelectron spectroscopy. The catalytic function was verified to be identical for PdZn and Cu This explains the origin of the high selectivity of PdZn for the steam reforming of methanol (SRM), CH_3OH + H_2O → 3H_2 + CO_2, a chemical reaction for which Cu is known to be one of the best catalyst ; namely, PdZn is catalytically equivalent to Cu. Compared with PdZn, PtZn and NiZn, which have the same crystal structure but different valence band structures, exhibit a poorer selectivity of CO_2. This suggests that the catalytic function, at least for SRM, is solely governed by the valence band structure of the catalyst. A simple but very important principle has been derived that an intermetallic compound may be logically designed by band structure calculation, aiming at replacing a selected metallic element without changing the catalytic function Using this principle, we designed a compound, PdCd, which exhibits a similar valence electron density of state and selectivity for SRM with Cu.
- 社団法人日本物理学会の論文
- 2004-12-15
著者
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TSAI An
Institute of Multidisciplinary Research for advanced Materials, Tohoku University
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Tsai A
National Institute For Materials Science
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Tsai A‐p
National Institute For Materials Science
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ISHII Yasushi
Department of Radiology
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Tsai A
Tohoku Univ. Sendai Jpn
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KAMEOKA Satoshi
Institute of Multidisciphnary Research for Advanced Materials, Tohoku University
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Kameoka Satoshi
Institute Of Materials Science University Of Tsukuba
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Tsai A‐p
Tohoku Univ. Sendai Jpn
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Tsai An
Institute For Materials Research Tohoku University
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Ishii Yasushi
Department Of Patho-functional Bioanalysis Graduate School Of Pharmaceutical Sciences Kyoto Universi
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Kameoka S
Univ. Tsukuba Ibaraki
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Ishii Y
Japan Atomic Energy Res. Inst. Ibaraki
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Ishii Yasushi
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo
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