通过引入氧气空隙,选择性氧化p-cymene 在 mesoporous LaCoO 上
Qingxia Zhang1, Dong Peng1,2, Zhong-An Su1
1Department of Chemical Engineering, School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China.
Inorganic chemistry
|October 29, 2024
概括
带有氧气空缺的半孔性甲 (LaCoO3) 催化剂有效地将p-cymene氧化为4-methylacetophenone. 这些可重复使用的催化剂具有很高的选择性,对工业化工合成具有很大的前景.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
背景情况:
- 液相催化氧化p-cymene到4-methylacetophenone在工业上非常重要.
- 在p-cymene中选择性C-H键氧化是具有挑战性的,因为它的分支结构.
研究的目的:
- 开发一种简单的方法来合成具有丰富氧气空缺的中孔LaCoO3催化剂.
- 为了评估这些中孔催化剂在p-cymene氧化中的催化性能.
主要方法:
- 通过一种简单的方法合成中孔性LaCoO3 (mLaCoO3).
- 在550°C的温度下进行化,以产生氧气空缺.
- 在特定条件下 (120 °C,3 MPa) 测试无溶剂p-cymene氧化中的催化活性和选择性.
主要成果:
- mLaCoO3催化剂实现了50.2%的p-cymene转化和超过80.1%的4-methylacetophenone选择性.
- 催化剂表现出很好的可重复使用性,在10个周期内保持活性.
- 鉴定证实了中性和氧空缺在增强催化性能方面的作用.
结论:
- 带有氧空缺的半孔LaCoO3是选择性p-cymene氧化的一种高度有效的催化剂.
- 催化剂的结构促进了离子扩散和氧气供应,这对于4-甲基烯的形成至关重要.
- 这种催化系统显示出在化学合成中的工业应用的巨大潜力.
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