NDLI: Activity and deactivation of Ru supported on La1.6Sr0.4NiO4 perovskite-like catalysts prepared by different methods for decomposition of N2O

Content Provider	Royal Society of Chemistry (RSC)
Author	Sui, Chao Niu, Xiaoyu Wang, Zhuo Yuan, Fulong Zhu, Yujun
Copyright Year	2016
Abstract	In this paper, the activity and stability of Ru supported on La1.6Sr0.4NiO4 perovskite-like catalysts prepared by two different methods, incipient wetness procedures with the addition of ethylene glycol (Ru/LSN-EG) and without ethylene glycol (Ru/LSN), were investigated for the decomposition of N2O. The catalysts were fully characterized by means of XRD, elemental analysis, N2-physisorption, TEM, H2-TPR, N2O-TPD and XPS. The Ru/LSN-EG catalyst retained high activity for 10 h without deactivation, which is attributed to the stable Ru3+ species, the much higher mobility of lattice oxygen and the regeneration ability of oxygen vacancies. However, the Ru/LSN catalyst presented deactivation; the initial N2O conversion of about 95% was only maintained for the first hour and decreased with time to 55% after 6 h. The reasons for this deactivation were investigated by a series of experiments and characterizations. The results indicate that the deactivation of the Ru/LSN catalyst can be ascribed to the difficult desorption of the oxygen species derived from N2O decomposition on the active sites; moreover, all the metallic Ru and Ru3+ species are oxidized to high oxidation state Ru4+ species. All the results demonstrated that the Ru3+ species was more favorable for N2O decomposition. Furthermore, the effects of O2 and H2O on the decomposition of N2O were also evaluated over the Ru/LSN-EG catalyst. High stability and no irreversible deactivation of the Ru/LSN-EG catalyst, even in the presence of O2 and H2O, were found.
Starting Page	8505
Ending Page	8515
Page Count	11
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	6
Issue Number	24
Journal	Catalysis Science & Technology
DOI	10.1039/c6cy01920j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Water Ethylene glycol Oxygen Transmission electron microscopy Physisorption Crystal structure
Content Type	Text
Resource Type	Article
Subject	Catalysis

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