Efficient Photocatalytic Propane Direct Dehydrogenation to Propylene Over PtO<sub>2</sub> Clusters
Abstract
AbstractThe direct dehydrogenation of alkanes to olefins under mild conditions is challenging due to the inert nature of alkyl C─H bonds. Herein, an efficient photocatalytic system is developed for propane direct dehydrogenation (PDH) to propylene, consisting of ≈1.30 nm sized PtO2 clusters immobilized on a layered double hydroxide ‐derived ZnO/Al2O3 support (LD‐Ptn). Under UV excitation (365 nm), photogenerated holes in ZnO migrate to Pt sites at PtO2/ZnO interfaces, thereby activating and dissociating C─H bonds in propane. A propylene production rate of almost 1 mmol g−1 h−1 and a nearly 100% selectivity are achieved for the compositionally optimized LD‐Ptn photocatalyst. Control experiments and density functional theory calculations further verify that the excellent photocatalytic PDH performance of LD‐Ptn stems from synergism between ZnO semiconductor and the loaded Pt species. This work identifies a promising new route for direct production of olefins from alkanes.
Article Details
Authors (10)
Chi Duan
Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing P. R. China
Jinjia Liu
National Energy Center for Coal to Liquids, Synfuels China Co., Ltd.
Zhenhua Li
State Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences
Run Shi
Jiaqi Zhao
Geoffrey I. N. Waterhouse
Xiao‐Dong Wen
State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan Shanxi 030001 P. R. China
Li‐Ping Zhang
State Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology Xi'an Jiaotong University Xi'an Shaanxi China
Li‐Zhu Wu
Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China
Tierui Zhang
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry