title: Growing and Etching MoS₂ on Carbon Nanotube Film for Enhanced Electrochemical Performance.
abstract: In this work we directly synthesized molybdenum disulfide (MoS₂) nanosheets on carbon nanotube film (MoS₂@CNT) via a two-step chemical vapor deposition method (CVD). By etching the obtained MoS₂@CNT into 10% wt HNO₃, the morphology of MoS₂ decorated on CNT bundles was modulated, resulting in more catalytic active MoS₂ edges being exposed for significantly enhanced electrochemical performance. Our results revealed that an 8 h acid etching sample exhibited the best performance for the oxygen evolution reaction, i.e., the current density reached 10 mA/cm² under 375 mV over-potential, and the tafel slope was as low as 94 mV/dec. The enhanced behavior was mainly originated from the more catalytic sites in MoS₂ induced by the acid etching treatment and the higher conductivity from the supporting CNT films. Our study provides a new route to produce two-dimensional layers on CNT films with tunable morphology, and thus may open a window for exploring its promising applications in the fields of catalytic-, electronic-, and electrochemical-related fields.
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. xuweiyu@mail.ustc.edu.cn.
authors.forename: Weiyu
authors.initials: W
authors.lastname: Xu
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. fq4311@mail.ustc.edu.cn.
authors.forename: Qi
authors.initials: Q
authors.lastname: Fang
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. ldbin@mail.ustc.edu.cn.
authors.forename: Daobin
authors.initials: D
authors.lastname: Liu
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. zk2009@mail.ustc.edu.cn.
authors.forename: Ke
authors.initials: K
authors.lastname: Zhang
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. mhabib@mail.ustc.edu.cn.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Habib
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. wucq@mail.ustc.edu.cn.
authors.forename: Chuanqiang
authors.initials: C
authors.lastname: Wu
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. zxs@ustc.edu.cn.
authors.forename: Xusheng
authors.initials: X
authors.lastname: Zheng
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. lhjbh@mail.ustc.edu.cn.
authors.forename: Hengjie
authors.initials: H
authors.lastname: Liu
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. csmp@ustc.edu.cn.
authors.forename: Shuangming
authors.initials: S
authors.lastname: Chen
authors.affiliation: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China. song2012@ustc.edu.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Song
mesh_terms: D004220:Disulfides / Q000737:chemistry*; D055664:Electrochemical Techniques; D008982:Molybdenum / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D017942:Nitric Acid / Q000737:chemistry*
chemical_list: D004220:Disulfides; D037742:Nanotubes, Carbon; D017942:Nitric Acid; D008982:Molybdenum; C082964:molybdenum disulfide
keywords: CVD; acid etching; carbon nanotube; electrochemical performance; molybdenum disulfide