Premium
High‐Density Lewis Acid Sites in Porous Single‐Crystalline Monoliths to Enhance Propane Dehydrogenation at Reduced Temperatures
Author(s) -
Lin Guoming,
Su Yunqi,
Duan Xiuyun,
Xie Kui
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202100244
Subject(s) - dehydrogenation , propane , lewis acids and bases , selectivity , chemistry , olefin fiber , propene , porosity , catalysis , inorganic chemistry , photochemistry , chemical engineering , organic chemistry , engineering
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.