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Selective catalytic oxidation of ammonia to nitrogen over CuO/CNTs: The promoting effect of the defects of CNTs on the catalytic activity and selectivity

Paper ID Volume ID Publish Year Pages File Format Full-Text
46387 46438 2012 5 PDF Available
Title
Selective catalytic oxidation of ammonia to nitrogen over CuO/CNTs: The promoting effect of the defects of CNTs on the catalytic activity and selectivity
Abstract

CuO/CNTs were prepared as catalysts for the selective catalytic oxidation of ammonia and demonstrated high catalytic activity and N2 selectivity. The study results showed that the surface defects of carbon nanotubes (CNTs) could not only activate CuO, but also promote the electron transfer in the catalysis. Thus, along with increasing the defect density of the CNTs, the temperature for the complete ammonia oxidation could be decreased from 235 °C to 189 °C and the corresponding N2 selectivity increased from 93.8% to 98.7%. Moreover, there was no apparent decrease in the catalytic activity at prolonged reaction time, indicating CuO/CNT catalysts are promising for the selective catalytic oxidation of ammonia.

Graphical abstractCuO/CNTs were prepared as catalysts for the selective catalytic oxidation of ammonia to nitrogen. The supported CuO could be activated by the surface defects of CNTs, and the defects can promote electron transfer in the catalysis. Thus, CuO/CNT catalysts demonstrated high activity and N2 selectivity, indicating a potential application for the selective catalytic oxidation of ammonia.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► CuO/CNTs catalysts. ► CuO could be activated by the surface defects of CNTs. ► The surface defects could also promote electron transfer in the catalysis. ► The temperature for ammonia SCO shifted to 189 °C with high N2 selectivity. ► The CuO/CNTs are promising catalysts for ammonia SCO.

Keywords
CuO/CNTs; Ammonia oxidation; N2 selectivity; Defects
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Selective catalytic oxidation of ammonia to nitrogen over CuO/CNTs: The promoting effect of the defects of CNTs on the catalytic activity and selectivity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 117–118, 18 May 2012, Pages 346–350
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
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Any Questions? feel free to contact us