title: A Facile and Efficient Method to Fabricate Highly Selective Nanocarbon Catalysts for Oxidative Dehydrogenation.
abstract: Carbon nanotubes (CNTs) were used in oxidative dehydrogenation (ODH) reactions. Quinone groups on the CNT surface were identified as active sites for the dehydrogenation pathway. Liquid-phase oxidation with HNO3is one way to generate various oxygen functionalities on the CNT surface but it produces a large amount of acid waste, limiting its industrial application. Here, a facile and efficient oxidative method to prepare highly selective CNT catalysts for ODH of n-butane is reported. Magnesium nitrate salts as precursors were used to produce defect-rich CNTs through solid-phase oxidation. Skeleton defects induced on the CNT surface resulted in the selective formation of quinone groups active for the selective dehydrogenation. The as-prepared catalyst exhibited a considerable selectivity (58 %) to C4olefins, which is superior to that of CNTs oxidized with liquid HNO3. Through the introduction of MgO nanoparticles on the CNT surface, the desorption of alkenes can be accelerated dramatically, thus enhancing the selectivity. This study provides an attractive way to develop new nanocarbon catalysts.
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua road 72, Shenyang, 110016, P.R. China.|School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, P.R. China.
authors.forename: Yajie
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua road 72, Shenyang, 110016, P.R. China.
authors.forename: Jia
authors.initials: J
authors.lastname: Wang
authors.affiliation: Sinopec Research Institute of Petroleum Processing, Beijing, 100083, P.R. China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Rong
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua road 72, Shenyang, 110016, P.R. China.
authors.forename: Jiangyong
authors.initials: J
authors.lastname: Diao
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua road 72, Shenyang, 110016, P.R. China.|School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, P.R. China.
authors.forename: Jiayun
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Sinopec Research Institute of Petroleum Processing, Beijing, 100083, P.R. China.
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Shi
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua road 72, Shenyang, 110016, P.R. China.
authors.forename: Hongyang
authors.initials: H
authors.lastname: Liu
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua road 72, Shenyang, 110016, P.R. China.
authors.forename: Dangsheng
authors.initials: D
authors.lastname: Su
mesh_terms: D002073:Butanes / Q000737:chemistry; D002384:Catalysis; D006865:Hydrogenation; D037742:Nanotubes, Carbon / Q000737:chemistry*; D017942:Nitric Acid / Q000737:chemistry; D010084:Oxidation-Reduction; D013499:Surface Properties
chemical_list: D002073:Butanes; D037742:Nanotubes, Carbon; D017942:Nitric Acid; C046888:butane
keywords: basic promoter; carbon nanotubes; magnesium oxide; oxidative dehydrogenation; solid-phase oxidation