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在与度匹配的基和甲基三相接口上将甲转化为乙醇
Chun He1, Lan Shang1, Hongfu Zhu1
1Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, Shanghai Engineering Research Center for Multimedia Environmental Catalysis and Resource Utilization, East China University of Science & Technology, Shanghai 200237, China.
现在直接将甲 (CH4) 转化为乙醇 (C2H5OH) 的效率更高. 一种新型的催化剂Fe (III) @ACN可促进这种转化,对乙醇具有很高的选择性,避免使用贵金属.
科学领域:
- 催化剂
- 材料科学
- 化学工程
背景情况:
- 甲 (CH4) 直接氧化为乙醇 (C2H5OH) 是非常理想的,但由于过氧化和C-C键裂变而面临挑战.
- 现有的方法通常会产生C1氧化物,因为ROR具有攻击乙醇中C-C键的强烈倾向,限制了C2产品的选择性.
研究的目的:
- 开发一种用于直接选择性氧化甲以乙醇的新型催化系统.
- 克服甲转化中的过氧化和C-C键裂变的局限性.
主要方法:
- 一个三相接口催化剂的设计和合成,Fe (III) 交联的巨孔酸水凝与C3N4 [Fe (III) @ACN]封装在一起.
- 通过在辐射下氧化水,利用催化剂的水友特性在现场生产H2O2.
- 使用光诱导Fe(II) 触发芬顿反应,产生基 (•OH) 用于甲激活和随后的碳链生长.
主要成果:
- Fe ((III) @ACN催化剂显示了H2O和CH4在巨孔结构中的活性位点的可达性.
- 在总酒精产品中获得了96%的选择性,在C2H5OH中获得了90%的选择性.
- 在不需要贵金属添加剂的情况下报告了高C2H5OH生产率为171.7μmolg-1h-1.
结论:
- 开发的Fe ((III) @ACN催化剂通过控制反应性氧物种和增强三相接口的质量转换有效地促进甲转化.
- 这种方法为选择性C-C键形成和甲氧化提供了一个有希望的,无金属的途径.
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