Chinese Journal of Catalysis ›› 2012, Vol. 33 ›› Issue (11): 1850-1856.DOI: 10.3724/SP.J.1088.2012.20458

• Research papers • Previous Articles     Next Articles

Adsorption and Decomposition of N2O on Cu/t-ZrO2(101) Surfaces

MAN Meiling1, GU Jiafang1, LI Lu1, LIN Huaxiang2, LI Yi1, CHEN Wenkai1,*   

  1. 1Department of Chemistry, Fuzhou University, Fuzhou 350116, Fujian, China; 2Fujian Provincial Key Laboratory of Photocatalysis-State Key Laboratory Breeding Base, Fuzhou University, Fuzhou 350002, Fujian, China
  • Received:2012-05-10 Revised:2012-08-13 Online:2012-11-16 Published:2012-11-16

Abstract: The density functional theory and slab models have been applied to investigate the adsorption and dissociation of N2O on perfect t-ZrO2 (101) and Cu/t-ZrO2 (101) surfaces. The results indicated that N2O adsorption on the ZrO2(101) surface is physical adsorption. The first of sub-surface oxygen site is the most stable adsorption site for the Cu/ZrO2(101) surface, and when the coverage is 0.25 ML, the most stable models were obtained with adsorption energy of 155.8 kJ/mol. The adsorption of N2O on the Cu/t-ZrO2(101) surface by O-end is weak physical adsorption, and the N-end and parallel adsorption energy is 121.6 and 66.8 kJ/mol, respectively. Vibrational frequency and the Mulliken population were calculated, and the results indicated that the symmetric and antisymmetric vibrational frequencies are red-shifted and the charge transfers from Cu/t-ZrO2(101) to N2O after adsorption. The N-end and parallel dissociation process were considered and the parallel dissociation process is more feasible.

Key words: density functional theory, nitrous oxide tetragonal, zirconia, copper, adsorption, dissociation