催化作用
羟醛缩合
甲基丙烯酸甲酯
色散(光学)
产量(工程)
化学
冷凝
降级(电信)
基础(拓扑)
化学工程
材料科学
有机化学
共聚物
聚合物
复合材料
电信
数学分析
物理
数学
计算机科学
光学
热力学
工程类
作者
Ran Ran,Hanwen Yan,Shouxin Zhang,Zengxi Li,Gang Wang,Gongying Wang,Weiguang Su,Chunshan Li
标识
DOI:10.1021/acs.iecr.4c01488
摘要
Supported Cs-based catalysts are considered as potential candidates for methyl methacrylate (MMA) synthesis via one-step aldol condensation, but they suffer from low activity. In this paper, the acid–base properties of the Cs/SiO2 catalyst were modulated by loading different amounts of the Al element. The changes in structural and physicochemical properties following Al introduction were revealed by a series of characterizations. In-depth investigation of the catalytic mechanism through in situ DRIFT combined with DFT calculations unveiled the synergistic effects between the Al and Cs components on the promotion of catalytic performance. The results showed that the presence of Al species facilitated the formation of weak and medium acid and base sites, along with the dispersion of the active Cs component, leading to an improvement of MMA yield. Additionally, the kinetic studies indicated that the addition of Al efficiently reduced the activation energy in comparison to pristine Cs/SiO2.
科研通智能强力驱动
Strongly Powered by AbleSci AI