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Surface-nitrogen removal in NO reduction on Pd(1 1 0) and its retardation by oxygen: Angle-resolved desorption studies

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タイトル: Surface-nitrogen removal in NO reduction on Pd(1 1 0) and its retardation by oxygen: Angle-resolved desorption studies
著者: Ma, Yunsheng 著作を一覧する
Matsushima, Tatsuo 著作を一覧する
キーワード: Nitrogen oxide
Nitrous oxide
Palladium
Single crystal surfaces
Reduction
Desorption
発行日: 2006年 9月30日
出版者: Elsevier B.V.
誌名: Catalysis Today
巻: 117
号: 1-3
開始ページ: 90
終了ページ: 97
出版社 DOI: 10.1016/j.cattod.2006.05.004
抄録: An oxygen retarding effect toward surface-nitrogen removal processes was studied in the course of the catalyzed NO reduction on Pd(1 1 0) by angle-resolved product desorption analysis combined with cross-correlation time-of-flight techniques. Three surface-nitrogen removal processes, i.e., (i) 2N(a) → N2(g), (ii) N(a) + NO(a) → N2O(a) → N2(g) + O(a) and (iii) N2O(a) → N2O(g) are operative when CO is a counter-reducing reagent. Process (i) becomes predominant above ca. 600 K and is most sensitively retarded by O(a). Below ca. 550 K, processes (ii) and (iii) remove most of the surface nitrogen. By addition of O(a), process (iii) is enhanced once, suggesting an increase in the amount of the intermediate N2O(a), whereas its decomposition in process (ii) is more quickly retarded.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/14629
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 松島 龍夫

 

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