奇托 -NH2衍生效率高的Co3O4催化剂用于 styrene 催化氧化:同时调节颗粒大小和同价值
Yinye Chen1, Wanyu Gong1, Kui Niu1
1Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou 350007, China.
Journal of colloid and interface science
|January 6, 2024
概括
一种新的基托桑辅助sol-gel方法合成了Co3O4催化剂,增强了C8H8.8的低温氧化. 改进的催化剂具有出色的耐水性,显示出工业应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术 纳米技术
背景情况:
- 开发高效的低温氧化催化剂对于工业应用至关重要.
- 控制催化剂的特性,如颗粒大小,价值和表面酸度是提高性能的关键.
- 奇托桑的独特特性为催化剂修改提供了潜在的可能性.
研究的目的:
- 通过基托辅助的sol-gel方法合成一个Co3O4催化剂.
- 研究基托桑对催化剂特性和低温氧化活性的影响.
- 为了评估催化剂的性能,机制和稳定性,用于C8H8氧化.
主要方法:
- 基托桑辅助的Co3O4催化剂的sol-gel合成.
- 使用拉曼光谱,H2-TPR,EPR和XPS进行了表征.
- 在低温下测试C8H8氧化的活性.
- 在现场DRIFTS和18O2同位素实验以阐明反应机制.
主要成果:
- 基托桑功能组抑制了聚合,使催化剂颗粒大小从82nm降低到31nm.
- 基托桑兴奋剂调节了CO2+并促进了氧气空缺的形成,增强了催化活性.
- 水洗改善了低温活动,并消除了金属的副作用.
- 在250°C时,CS/Co3O4-W催化剂实现了高C8H8氧化活性 (8.33μmol g-1 s-1).
- 反应遵循Mars-van Krevelen机制,催化剂显示出优越的抗水性.
结论:
- 基托桑辅助的sol-gel方法有效地合成了高度活性和稳定的Co3O4催化剂.
- CS/Co3O4-W催化剂在低温氧化过程中显示出工业应用的巨大潜力.
- 了解反应机制和催化剂稳定性对于实际实施至关重要.
关键词:
催化烯氧化催化烯氧化基托功能组是基托的功能组之一.() () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () () ()反应机制的反应机制表面的酸性 表面的酸性相关概念视频
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