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Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene Catalyzed Ethylbenzene Dehydrogenation: Active Sites and Mechanism Exploration from both Experimental and Theoretical Aspects

Jiangyong DiaoShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People’s Republic of ChinaMinmin HuSchool of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, People’s Republic of ChinaZan LianSchool of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, People’s Republic of ChinaZhaojin LiShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People’s Republic of ChinaHui ZhangShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People’s Republic of ChinaFei HuangSchool of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, People’s Republic of ChinaBo LiShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People’s Republic of ChinaXiaohui WangShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People’s Republic of ChinaDang Sheng SuShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People’s Republic of ChinaHongyang LiuShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People’s Republic of China
2018en
ABI

Аннотация

Two-dimensional materials (such as graphene, MXenes) usually perform remarkably well as catalysts in comparison with their three-dimensional counterparts. In this work, Ti3AlC2-derived Ti3C2Tx MXene (T = O, OH, F) was prepared and employed in the direct dehydrogenation of ethylbenzene. A 92 μmol m–2 h–1 reactivity and a 40 h stability with almost no deactivation were observed, which is much better than those of the previously reported nanocarbon catalysts. The graphene-like layered structure and the C–Ti–O termination groups induced by the preparation process were thought to account for the good catalytic performance of Ti3C2Tx MXene from both experimental and computational perspectives. The discovery expands the application of two-dimensional MXenes and provides more choices in exploring high-activity catalysts for hydrocarbon dehydrogenation reactions.

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DOI
10.1021/acscatal.8b02002

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