Journal
MOLECULAR CATALYSIS
Volume 437, Issue -, Pages 37-46Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2017.05.004
Keywords
NO plus CO reaction; Ru; La1.6Ba0.4NiO4 perovskite-like
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Funding
- Natural Sciences Fund of Heilongjiang Province [B2015009]
- Foundation of Educational Commission of Heilongjiang Province of China [11531286]
- Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education
- Harbin science and technology innovation talent fund [RC2016XK015004]
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In this paper, the activity of La1.6Ba0.4NiO4 (LBN) and Ru/La1.6Ba0.4NiO4 (Ru/LBN) perovskite-like catalysts was investigated for NO + CO reaction. Meanwhile, Ru/LBN exhibited much higher activity than LBN. The catalysts were fully characterized by means of XRD, elemental analysis, N-2-physisorption, H-2-TPR, XPS, O-2-TPD, NO-TPD and CO-TPD. These results demonstrated that the excellent catalytic performance of Ru/LBN catalyst was associated with the strong interaction between Ru and LBN, leading to enhancing reducibility and mobility of oxygen species and increasing the amount of the surface adsorbed oxygen. In addition, the amount of adsorbed CO and NO increased largely for Ru/LBN. And Ru3+ species on the surface of Ru/LBN was considered as an effective active site for NO + CO reaction. In-situ DRIFTS was used for studying the relationship between catalytic activity and NO, CO adsorption ability, species and sites. The results indicated that the new active species were formed on the surface of Ru/LBN compared with LBN including inorganic carboxylate, monodentate carbonate, Ru-NO, bridged nitrate and nitrite. (C) 2017 Elsevier B.V. All rights reserved.
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