書誌事項
- タイトル別名
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- Activation Barriers of CO Oxidation on Pt-M(M=Ru, Sn) Alloys
- Pt-M合金(M=Ru, Sn)上におけるCO酸化に関する活性化エネルギーの評価
- Pt M ゴウキン M Ru Sn ジョウ ニ オケル CO サンカ ニ カンスル カッセイカ エネルギー ノ ヒョウカ
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抄録
Fuel cells have attracted attention in recent years because they are very energy-efficient. However, we have to face up to a serious problem in that platinum, which is the usual anode electrocatalyst, is readily poisoned by CO. In the case of the Direct Methanol Fuel Cell (DMFC), it is very important to develop new materials for use as electrocatalysts that exhibit good tolerance to CO, since CO is invariably present as an intermediate in the dissociation of methanol. The aim of this study is to examine the mechanism of H2O dissociation and of the CO+OH combination reactions in the CO oxidation process by calculating the adsorption energies and the activation barriers. In the case of Pt-Ru alloys, the activation barrier of the H2O dissociation reaction is almost the same as it is for pure Pt. The activation energy of the CO+OH combination reaction on Pt-Ru alloy is larger than that on pure Pt. Nevertheless, the adsorption energy of H2O is larger than that on pure Pt. On the other hand, the activation barrier and adsorption energies of H2O on Pt-Sn alloy are very close to the corresponding values on pure Pt. Moreover, the activation barrier for the CO+OH combination reaction on Pt-Sn alloy is lower than that on pure Pt.<br>
収録刊行物
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- 日本金属学会誌
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日本金属学会誌 70 (6), 495-499, 2006
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
- 1390282681455296640
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- NII論文ID
- 10018161273
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- NII書誌ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- HANDLE
- 10097/52237
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- NDL書誌ID
- 8011144
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可