引用本文:
仲崇民, 王德峥, Takashi Ushikubo, Keisuke Wada. 甲醇、水及乙烯在氧化铌薄膜上吸附行为研究[J]. 物理化学学报,
1998, 14(03): 219-225.
doi:
10.3866/PKU.WHXB19980306
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
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
甲醇、水及乙烯在氧化铌薄膜上吸附行为研究
English
The Adsorption of Methanol,Water and Ethylene on a Niobium Oxide Thin Film
Abstract:
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.
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Key words:
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Niobium oxide
- / Thin film
- / Adsorption
- / Methanol
- / Water
- / Ethylene
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