title: Phosphate-modified carbon nanotubes in the oxidative dehydrogenation of isopentanes.
abstract: Ketonic/quinonic C=O groups on the surface of a carbon matrix are capable of abstracting hydrogen in C=H bonds from hydrocarbons and enable them to selectively convert into corresponding unsaturated hydrocarbons; this process is the oxidative dehydrogenation (ODH) reaction. However, a variety of inevitable defects or graphene edges and other oxygen-containing groups on the carbon matrix are detrimental to the selective production of alkenes due to their high activity towards overoxidation. Herein, we show that phosphate can not only impede the total oxidation but also cover the selective C=O groups, hence allowing its use as a modulator to defects and oxygen-containing functional groups on the multiwalled carbon nanotubes, regulating the distribution of active sites and related catalytic targets.
authors.affiliation: Lab of Advanced Materials & Catalytic Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024 (PR China); Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, No. 72 Wenhua Road, Shenyang 110016 (PR China).
authors.forename: Rui
authors.initials: R
authors.lastname: Huang
authors.forename: Hong Yang
authors.initials: HY
authors.lastname: Liu
authors.forename: Bing Sen
authors.initials: BS
authors.lastname: Zhang
authors.forename: Xiao Yan
authors.initials: XY
authors.lastname: Sun
authors.forename: Chang Hai
authors.initials: CH
authors.lastname: Liang
authors.forename: Dang Sheng
authors.initials: DS
authors.lastname: Su
authors.forename: Bao Ning
authors.initials: BN
authors.lastname: Zong
authors.forename: Jun Feng
authors.initials: JF
authors.lastname: Rong
mesh_terms: D006859:Hydrogen / Q000737:chemistry*; D037742:Nanotubes, Carbon; D010084:Oxidation-Reduction; D010420:Pentanes / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D010420:Pentanes; D010710:Phosphates; D006859:Hydrogen
keywords: active sites; carbon nanotubes; dehydrogenation; hydrocarbons; phosphorous