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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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Title: Surface-nitrogen removal in NO reduction on Pd(1 1 0) and its retardation by oxygen: Angle-resolved desorption studies
Authors: Ma, Yunsheng Browse this author
Matsushima, Tatsuo Browse this author →KAKEN DB
Keywords: Nitrogen oxide
Nitrous oxide
Palladium
Single crystal surfaces
Reduction
Desorption
Issue Date: 30-Sep-2006
Publisher: Elsevier B.V.
Journal Title: Catalysis Today
Volume: 117
Issue: 1-3
Start Page: 90
End Page: 97
Publisher DOI: 10.1016/j.cattod.2006.05.004
Abstract: 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.
Type: article (author version)
URI: http://hdl.handle.net/2115/14629
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松島 龍夫

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