The Reduction of ¹⁵N¹⁴NO by CO and by H₂ over Rh/SiO₂ : a test of a mechanistic proposal | Macquarie University ResearchOnline

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The Reduction of ¹⁵N¹⁴NO by CO and by H₂ over Rh/SiO₂ : a test of a mechanistic proposal

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/115264

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Title: The Reduction of ¹⁵N¹⁴NO by CO and by H₂ over Rh/SiO₂ : a test of a mechanistic proposal
Related: Journal of catalysis, Vol. 278, Issue 1 (2010), p.162-166
DOI: 10.1016/j.jcat.2010.11.005
Publisher: Elsevier
Date: 2011
FoR/RFCD Code(s): 090400 Chemical Engineering 030600 Physical Chemistry (incl. Structural
Author/Creator: Cant, Noel W
Author/Creator: Chambers, Dean C
Author/Creator: Liu, Irene O.Y
Description: A literature proposal that the reduction of nitrous oxide by carbon monoxide over rhodium catalysts proceeds by cleavage of the Nsingle bondN bond has been tested through the use of ¹⁵N¹⁴NO as the reactant. The results disprove the suggestion in that ¹⁴N¹⁵N is the dominant product at temperatures from 336 °C to 356 °C with nitrous oxide conversions from 26% to >99%. Little, if any, ¹⁴N₂ and ¹⁵N₂ is formed, in contrast with the 25% of each expected for the model. Results for the corresponding reaction of ¹⁵N¹⁴NO with H₂ are even more clear-cut in demonstrating the absence of N-N bond cleavage. The activity of the Rh/SiO₂ used here for the N₂O/CO system fell within the rather wide of values reported in the literature for other Rh catalysts. However, activity for the reduction of N₂O by H₂ was approximately five times higher than the only previous result in the literature, that for a Rh/Al₂O₃ catalyst. Graphical abstract The reduction of ¹⁵N¹⁴NO by carbon monoxide, and also by hydrogen, over a Rh/SiO₂ catalyst yields ¹⁵N¹⁴N as the exclusive nitrogen-containing product. The result rules out a suggestion in the literature that the reduction using carbon monoxide proceeds through cleavage of the nitrogensingle bondnitrogen bond.
Description: 5 page(s)
Subject Keyword: 090400 Chemical Engineering
Subject Keyword: 030600 Physical Chemistry (incl. Structural
Subject Keyword: Rh/SiO₂, N₂O + CO reaction
Subject Keyword: N₂O + H₂ reaction
Subject Keyword: ¹⁵N¹⁴NO reduction mechanism
Resource Type: journal article
Organisation: Macquarie University. Dept. of Chemistry and Biomolecular Sciences

Identifier: http://hdl.handle.net/1959.14/115264
Identifier: ISSN:0021-9517
Identifier: mq-rm-2010003280
Language: eng
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