摘要
采用表面改性法制备了Ｖ２Ｏ５ＳｉＯ２ ， ＭｏＯ３ＳｉＯ２ ， Ｖ２Ｏ５ＭｏＯ３ＳｉＯ２ 复合氧化物催化剂，并用ＴＰＲ和ＩＲ 技术研究了催化剂的表面结构及Ｖ Ｏ ， Ｍｏ Ｏ 的活性，同时用化学吸附ＩＲ 技术研究了催化剂样品对异丁烷的化学吸附性能． 实验结果表明： 这些复合氧化物催化剂对异丁烷都有较高的化学吸附能力；ＳｉＯ２ 能缓解表面Ｌｅｗｉｓ 碱位Ｖ Ｏ 和 Ｍｏ Ｏ 的氧化能力，有利于选择氧化．
The complex oxide compounds of V 2O 5 SiO 2, MoO 3 SiO 2 and V 2O 5 MoO 3 SiO 2 have been prepared by the method of surface modification. The surface construction of all the catalysts and the reactivity of VO and Mo O have been investigated by using TPR and IR. The chemisorption properties of i butane on these catalysts have been investigated by using IR. The experimental results showed that: i butane can be easily adsorbed on VO and Mo O of the surface of V 2O 5 SiO 2, MoO 3 SiO 2 and V 2O 5 MoO 3 SiO 2. SiO 2 can decrease the oxidizability of the Lewis alkalinity of VO and Mo O so that it is suitable for the selective oxidation.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1999年第2期129-133,共5页
基金
国家自然科学基金!资助项目
批准号29773031
关键词
钒
钼
硅
复合氧化物
催化剂
选择氧化
氧化
vanadium pentoxide, molybdenum trioxide, silica, complex oxide catalyst, surface modification, selective oxidation
