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Acta Physico-Chimica Sinica  1998, Vol. 14 Issue (03): 219-225    DOI: 10.3866/PKU.WHXB19980306
The Adsorption of Methanol,Water and Ethylene on a Niobium Oxide Thin Film
Zhong  Chong-Min, Wang-De-Zheng, Takashi  Ushikubo, Keisuke  Wada
State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,P.O.Box 110,Dalian 116023|Mitsubishi chemical Corporation,Yokohama Research Center,1000,Kamoshida,Aoba-ku,Yokohama 227,Japan
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 A niobium oxide thin film was obtained by oxidizing Nb(110). UPS was used to characterize the adsorption of methanol, water and ethylene on this film at different temperatures. The results show that at 140K, methanol and water chemisorb associatively at all coverages, while ethylene chemisorbs at low coverages and physisorbs at high coverages. At 300K, these molecules adsorb dissociativelly. The adsorption on surface defect centers is stronger: molecules are adsorbed on these sites first, and are also more affected by the adsorption. Nb5+ is the main adsorption centers on the surface, but oxygen ions on the surface are also adsorption centers.

Key wordsNiobium oxide      Thin film      Adsorption      Methanol      Water      Ethylene     
Received: 19 May 1997      Published: 15 March 1998
Corresponding Authors: Wang De-Zheng   
Cite this article:

Zhong Chong-Min, Wang-De-Zheng, Takashi Ushikubo, Keisuke Wada. The Adsorption of Methanol,Water and Ethylene on a Niobium Oxide Thin Film. Acta Physico-Chimica Sinica, 1998, 14(03): 219-225.

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