期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 12, 期 41, 页码 13707-13714出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c004291a
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资金
- National Science Council of Republic of China [NSC 96-2113-M-003-007-MY3]
We applied periodic density-functional theory to investigate the interaction of NOx on Ni(111) surface for small and large coverages. For a small coverage, adsorbed species, such as NO, N2O and NO2, tend to dissociate to form atomic N and atomic O on the surface, but a large barrier, 2.34 eV, hinders the recombination of adsorbed N to form N-2. At a large coverage, the recombination of N and NO to form N2O is favorable; this species might either desorb or break the N-O bond to form N-2. Our calculated results agree satisfactorily with experimental observations. The formation of N-2 via paths that vary with coverage is analyzed and discussed.
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