Two-dimensional atomically thin Pt layers on MXenes: The role of electronic effects during catalytic dehydrogenation of ethane and propane  

作　　者：Zhe Li Tobias K.Misicko Fan Yang Xiaopeng Liu Zhenwei Wu Xiaoyang Gao Tao Ma Jeffrey T.Miller Daniela S.Mainardi Collin D.Wick Zhenhua Zeng Yang Xiao Yue Wu 

机构地区：[1]Department of Chemical and Biological Engineering,Iowa State University,618 Bissell Road,Ames,IA 50011,USA [2]Institute for Micromanufacturing,Louisiana Tech University,505 Tech Drive,Ruston,LA 71272,USA [3]Davidson School of Chemical Engineering,Purdue University,480 Stadium Mall Drive,West Lafayette,IN 47907,USA [4]Michigan Center for Materials Characterization,University of Michigan,2800 Plymouth Rd,Ann Arbor MI 48109,USA [5]College of Engineering and Science,Louisiana Tech University,Ruston,LA 71272,USA

出　　处：《Nano Research》2024年第3期1251-1258,共8页纳米研究（英文版）

基　　金：support from Iowa State University(Herbert L.Stiles Professorship).Y.X.and T.K.M.appreciate the start-up funding from the College of Engineering and Science at Louisiana Tech University.Z.W.W.and J.T.M.were supported by the National Science Foundation under Cooperative Agreement(NSF/ERC CISTAR,No.EEC-164772);Use of the Advanced Photon Source,a US Department of Energy Office of Basic Energy Sciences,was supported under contract no.DE-AC02-06CH11357.

摘　　要：Atomically thin Pt nanolayers were synthesized on the surface of Mo2TiC2 MXenes and used for the catalytic dehydrogenation of ethane and propane into ethylene and propylene,two important chemicals for the petrochemical industry.As compared with Pt nanoparticles,the atomically thin Pt nanolayer catalyst showed superior coke-resistance(no deactivation for 24 h),high activity(turnover frequencies(TOFs)of 0.4–1.2 s^(-1)),and selectivity(>95%)toward ethylene and propylene.The unique Pt nanolayer has a similar geometric surface to Pt nanoparticles,enabling the investigations of the electronic effect on the catalytic performance,where the geometric effect is negligible.It is found that the electronic effect plays a critical role in dehydrogenative product selectivity and catalyst stability.The metal–support interaction is found dependent on the substrate and metal components,providing wide opportunities to explore high-performance MXene-supported metallic catalysts.

关 键 词：MXene CATALYSIS ALKANE DEHYDROGENATION NANOLAYERS 

分 类 号：O64[理学—物理化学]