洞察烯对Cu-Ce支持的催化剂总氧化的催化性能和反应机制
Xuan Liang1, Jin Zhang1, Juntai Tian1
1School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
将二氧化 (CeO2) 添加到氧化铜 (CuO) /氧化 (Al2O3) 催化剂中,可显著增强二氧化. 改进的CuO-CeO2/Al2O3催化剂在较低的温度下有效地去除挥发性有机化合物.
科学领域:
- 不同质的催化剂.
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 托卢氧化对于去除挥发性有机化合物 (VOC) 至关重要.
- 支持的氧化铜催化剂正在探索用于减少VOC.
- 像Ceria这样的促进剂在增强催化活性中的作用需要进一步研究.
研究的目的:
- 为了合成和描述CuO/Al2O3,CeO2/Al2O3和CuO-CeO2/Al2O3催化剂.
- 评估CeO2添加对二烯氧化催化性能的影响.
- 阐明氧化对开发的催化剂的反应机制.
主要方法:
- 通过浸合成催化剂.
- 使用N2吸附-脱附,XRD,SEM,EDS,拉曼,EPR,H2-TPR,O2-TPD,XPS,NH3-TPD,托-TPD进行的表征.
- 在机理学研究中使用现场的DRIFTS.
主要成果:
- 与CuO/Al2O3.3相比,CuO-CeO2/Al2O3表现出更高的性能,降低了T50和T90,分别降低了33°C和39°C.
- 增强的活性归因于强烈的铜-相互作用和增加的氧空缺.
- 在现场,DRIFTS证实了烯转化为酸的促进,并加速了深层降解途径.
结论:
- 添加CeO2显著提高了CuO/Al2O3的催化效率,用于二烯的氧化.
- Cu和Ce物种之间的协同效应,加上丰富的氧气空缺,是提高性能的关键.
- 这项研究为开发成本有效的催化剂以去除VOC提供了洞察力.
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