调节铜分散和活性Cu0/Cu+ 位点在Cu/CeO2催化剂中,通过受控的化大气层进行高效的5-Hydroxymethylfurfural化
Mengmeng Jin1, Yaolei Zhao1, Weiting Li1
1School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, P. R. China.
ChemSusChem
|February 2, 2026
概括
一个新的Cu/CeO2-Ar催化剂显著提高了5-基甲基 (5-HMF) 到2,5-bis (基甲基) (BHMF) 的化. 这种催化剂由于优化铜分散和活性位点,可以实现高产量和反应速率.
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
- 绿色化学 绿色化学
背景情况:
- 2,5-二甲基 (BHMF) 是制药和皇冠乙烯的关键中间体.
- 从5-基甲 (5-HMF) 中有效合成BHMF需要高反应速率,这仍然是一个挑战.
- 基于铜的催化剂支持氧化是探索这个转换.
研究的目的:
- 为了合成和评估Cu/CeO2-x催化剂,在不同的大气层下化,以使5-HMF化为BHMF.
- 了解催化剂结构,特性和化反应中的性能之间的关系.
- 阐明不同活性位点在催化过程中的作用.
主要方法:
- 在H2/Ar,空气或Ar大气下通过化合成Cu/CeO2-x催化剂的合成.
- 在特定反应条件下 (180°C,5小时,1MPa H2) 对5-HMF化催化剂的评估.
- 使用包括现场里埃变换红外光谱 (FTIR) 在内的技术进行表征.
主要成果:
- /CeO2-Ar催化剂表现出卓越的性能,反应速率为26.8 mmol·gcat-1·h-1和99.1%的BHMF产量.
- 在气氛中的化导致了高Cu分散,小Cu颗粒大小,丰富的Cu+-OV-Ce3+位点和增加的Cu0.
- 在现场FTIR显示,Cu+位吸附5-HMF碳基,而Cu0位促进H2解离.
结论:
- Cu/CeO2-Ar催化剂对5HMF化到BHMF表现出极高的活性和选择性.
- 由氧空缺 (OV) 和Ce3+促进的Cu0和Cu+活性位点之间的协同相互作用对于高性能至关重要.
- 通过可控化大气的优化催化剂制备是提高化效率的关键.
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