Preparation and structure of alumina supported niobia model catalysts

SURFACE SCIENCE

卷:601

Article

Uhl, A.¹  Sainio, J.^1,2  Lahtinen, J.²  Shaikhutdinov, S.¹  Freund, H. -J.¹ 

[1] Max Planck Gesell, Fritz Haber Inst, Berlin, Germany

[2] Aalto Univ, Phys Lab, FIN-02015 Espoo, Finland

关键词: niobium oxides;    model catalysts;    thin oxide films;    vanadia;    niobia;    scanning tunneling microscopy;    infrared spectroscopy;   

DOI  :  10.1016/j.susc.2007.09.035

来源: Elsevier

【 摘 要 】

Niobia/alumina model catalysts were prepared by physical vapor deposition of Nb in an oxygen atmosphere onto thin alumina films. Structural characterization, performed with scanning tunneling microscopy and infrared reflection absorption spectroscopy, revealed highly dispersed N2O5 nanoparticles exposing Nb=O groups. Thermal stability of the system was also examined. The results are compared with those obtained on thin niobia films and previously studied vanadia/alumina systems. (c) 2007 Elsevier B.V. All rights reserved.

【 授权许可】

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