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Citation: Zhong Chong-Min, Takashi Ushikubo, Keisuke Wada. The Adsorption of Methanol,Water and Ethylene on a Niobium Oxide Thin Film[J]. Acta Physico-Chimica Sinica, ;1998, 14(03): 219-225. doi: 10.3866/PKU.WHXB19980306 shu

The Adsorption of Methanol,Water and Ethylene on a Niobium Oxide Thin Film

1.
State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,P.O.Box 110,Dalian 116023

Received Date: 19 May 1997
Available Online: 15 March 1998

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.
- Niobium oxide,
- Thin film,
- Adsorption,
- Methanol,
- Water,
- Ethylene
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