CRCU

Chemical Research in Chinese Universities ›› 1993, Vol. 9 ›› Issue (3): 214-219.

• Articles • Previous Articles     Next Articles

The Effect of the Oxygen Preadsorption on the Adsorption of Nitric Oxide on Mo (111)

WANG Guo-Jia1, K. B. Lewis2, G. A. Somorjai2   

  1. 1. Department of Chemistry, Jilin University, Changchun, 130023;
    2. Materials and Molecular Research Division Lawrence Berkeley Laboratory and Department of Chemistry, University of California Berkeley, California, 94720, U. S. A.
  • Received:1992-04-23 Online:1993-08-24 Published:2011-08-17

PDF (PC)

Abstract: The adsorption of nitric oxide adsorption on clean Mod(111), Mo(111)/O2-(4×4), Mo(111)/O2-(1×3), Mo(111)/O2-(112) facets and Mo(111) oxide surfaces was studied. Mass 28 (N2) desorption spectra show two high temperature peaks at approximate 1030 (β1) and 1200K (β2). For NO exposures less than 0. 1 L only the β2 peak was observed. At higher exposures, the β1 peak appeared and small amounts of N2O as well as NO desorbed. The preadsorption of oxygen blocked the β1 desorption partially on the (4×4) and (1×3) surfaces and fully on the (112) facet and oxide surfaces. In addition, the β1 desorption peak shifted to higher temperatures with increasing oxygen preexposure.

Key words: Adsorption, Nitric、oxide, Oxygen preadsorption