Direct determination of product branching for the NH2 + NO reaction at temperatures between 302 and 1060 K

Joonbum Park, Ming-Chang Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

The branching ratio of the two product channels of the NH2 + NO reaction, α and β for the formation of N2H + OH and N2 + H2O, respectively, have been determined independently at temperatures between 302 and 1060 K by mass spectrometry. For β determination, the concentration of H2O was measured directly, whereas for α, the yield of OH was monitored by the CO2 formed by its reaction with added CO. Both [H2O] and [CO2] were carefully calibrated with different standard mixtures before each measurement. α was found to increase gradually from 0.11 ± 0.02 at 302 K to 0.30 ± 0.02 at 1060 K, with the concomitant decrease of β from 0.89 ± 0.04 to 0.70 ± 0.03. The two independent measurements indicate for the first time that the relationship α + β = 1 holds quantitatively throughout the temperature range studied.

Original languageEnglish
Pages (from-to)3317-3319
Number of pages3
JournalJournal of Physical Chemistry
Volume100
Issue number9
DOIs
StatePublished - 29 Feb 1996

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