脱氢
丙烷
路易斯酸
选择性
材料科学
烯烃纤维
化学
丙烯
多孔性
催化作用
无机化学
碳氢化合物
化学工程
光化学
有机化学
工程类
作者
Guoming Lin,Yunqi Su,Xiuyun Duan,Kui Xie
标识
DOI:10.1002/anie.202100244
摘要
The non-oxidative dehydrogenation of propane to propylene plays an important role in the light-olefin chemical industry. However, the conversion and selectivity remain a fundamental challenge at low temperatures. Here we create and engineer high-density Lewis acid sites at well-defined surfaces in porous single-crystalline Mo2N and MoN monoliths to enhance the non-oxidative dehydrogenation of propane to propylene. The top-layer Mo ions with unsaturated Mo-N1/6 and Mo-N1/3 coordination structures provide high-density Lewis acid sites at the surface, leading to the effective activation of C−H bonds without the overcracking of C−C bonds during the non-oxidative dehydrogenation of propane. We demonstrate a propane conversion of ≈11 % and a propylene selectivity of ≈95 % with porous single-crystalline Mo2N and MoN monoliths at 500 °C.
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