在油泡中氧化有氧酒精的皮克林界面催化
Shi Zhang1,2, Dmytro Dedovets2, Andong Feng1,2
1UMI 3464 CNRS, Solvay, Eco-Efficient Products and Processes Laboratory (E2P2L), 3966 Jin Du Road, Xin Zhuang Ind. Zone, 201108 Shanghai, China.
Journal of the American Chemical Society
|January 24, 2022
概括
具有化颗粒的催化油泡使用环境氧气有效氧化酒精. 与传统系统相比,这些稳定,可回收的泡具有显著的增强活性.
科学领域:
- 催化剂
- 材料科学
- 化学工程
背景情况:
- 大量催化系统通常需要恶劣的条件来氧化酒精.
- 开发高效且可回收的有氧氧化催化剂仍然是一个关键挑战.
研究的目的:
- 通过表面活性催化颗粒稳定油泡对酒精氧化的有效性进行研究.
- 将泡性能与催化性能和可回收性相关联.
主要方法:
- 通过含的Pd纳米粒子稳定使用的油泡.
- 在环境氧气压力下评估芳香醇和酸醇的有氧氧化
- 研究了粒子度和接触角度对泡稳定性和催化活性的影响.
- 在多个反应周期中评估催化剂的可回收性.
主要成果:
- 泡稳定催化剂证明了各种酒精的快速有效氧化.
- 在低颗粒度 (<1重 %) 和41°-73°之间的接触角度下,可实现高泡稳定性.
- 与非泡系统相比,纯氧的催化活性增加了7-10倍,突出显示了泡性能的作用.
- 最佳的催化活性来自中间泡稳定性,平衡界面面积和气体交换.
- 催化剂得到有效回收,并保持至少7次运行.
结论:
- 由催化颗粒稳定的油泡为有氧酒精氧化提供了高效的平台.
- 泡的稳定性和特性对于最大限度地提高催化性能和实现高效的气液反应至关重要.
- 开发的系统为传统的散装催化方法提供了可回收和有效的替代方案.
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