Analysis of the reaction of carbon with NO/N2O using Ab initio molecular orbital theory

Takashi Kyotani, Akira Tomita

Research output: Contribution to journalArticlepeer-review

111 Citations (Scopus)

Abstract

An attempt was made to analyze the reaction of carbon with NO or N2O by using an ab initio molecular orbital theory. This method allows the simulation of the chemisorption process of these gas molecules on zigzag and armchair edge sites of carbon. It was found that NO adsorption with the N atom down is more thermally favorable than the adsorption with the O atom down, while the O down mode is more favorable than the N down one for N2O adsorption because the former process releases a stable N2 molecule to form a surface oxygen complex. The chemisorption of NO or N2O with its bond axis parallel to the edge line gave the most stable chemisorbed species. The presence of surface oxygen complexes (quinone-type carbonyl group) on the edge decreases the strength of some bonds in NO- and N2O-chemisorbed species and consequently lowers their thermal stability. Furthermore, the N2 formation process in the C-NO/N2O reaction was analyzed and possible N2 formation routes were proposed. The routes predicted by the molecular orbital theory were compared with the previous experimental results.

Original languageEnglish
Pages (from-to)3434-3441
Number of pages8
JournalJournal of Physical Chemistry B
Volume103
Issue number17
DOIs
Publication statusPublished - 1999 Apr 29

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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