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Catalysts 2016, 6(11), 173; doi:10.3390/catal6110173

Effect of Ru Species on N2O Decomposition over Ru/Al2O3 Catalysts

1
Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin 150080, China
2
College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Albert Demonceau, Ileana Dragutan, Valerian Dragutan and Keith Hohn
Received: 30 August 2016 / Revised: 16 October 2016 / Accepted: 1 November 2016 / Published: 5 November 2016
(This article belongs to the Special Issue Ruthenium Catalysts)
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Abstract

Ru is considered as an effective active species for N2O decomposition; however, there is disagreement about which ruthenium species is key for catalytic activity. In order to understand the role of Ru species in N2O decomposition, Ru/Al2O3 (Ru/Al2O3-H2, Ru/Al2O3-NaBH4, Ru/Al2O3-air) catalysts with different ratios of metallic Ru were prepared and evaluated for their catalytic activities. Various characterizations, especially in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), were applied to investigate the relationship between activity and different Ru species. The results indicate that the N2O conversion displayed a linear relationship with the amount of metallic Ru. The DRIFTS results of adsorption for N2O show that metallic Ru was the active site. The catalytic processes are put forward based on metallic Ru species. The deactivation with increasing times used is due to the decrease in the amount of metallic Ru and agglomerates of Ru particles on the surface of catalysts. View Full-Text
Keywords: N2O decomposition; metallic Ru; deactivation reason N2O decomposition; metallic Ru; deactivation reason
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Sui, C.; Yuan, F.; Zhang, Z.; Zhang, C.; Niu, X.; Zhu, Y. Effect of Ru Species on N2O Decomposition over Ru/Al2O3 Catalysts. Catalysts 2016, 6, 173.

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