High-Density Lewis Acid Sites in Porous Single-Crystalline Monoliths to Enhance Propane Dehydrogenation at Reduced Temperatures

作     者：Dr. Guoming Lin Yunqi Su Xiuyun Duan Prof. Dr. Kui Xie 

作者机构：Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Key Laboratory of Design & Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 China Advanced Energy Science and Technology Guangdong Laboratory 29 Sanxin North Road Huizhou Guangdong 116023 China 

出 版 物：《Angewandte Chemie》 

年 卷 期：2021年第133卷第17期

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

主　　题：dehydrogenation Lewis acids molybdenum nitrides porous materials 

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 Mo 2 N and MoN monoliths to enhance the non-oxidative dehydrogenation of propane to propylene. The top-layer Mo ions with unsaturated Mo-N 1/6 and Mo-N 1/3 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 Mo 2 N and MoN monoliths at 500 °C.