• 文献标题:   Controllable nanoscale engineering of vertically aligned MoS2 ultrathin nanosheets by nitrogen doping of 3D graphene hydrogel for improved electrocatalytic hydrogen evolution
  • 文献类型:   Article
  • 作  者:   ZHAO L, HONG CC, LIN LX, WU HP, SU YW, ZHANG XB, LIU AP
  • 作者关键词:  
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:   Zhejiang Sci Tech Univ
  • 被引频次:   45
  • DOI:   10.1016/j.carbon.2017.02.010
  • 出版年:   2017

▎ 摘  要

Three-dimensional (3D) porous molybdenum disulfide/nitrogen-doped reduced graphene oxide (MoS2/N-rGO) hydrogels were fabricated through a facile and controllable one-pot hydrothermal method. The nanosized MoS2 ultrathin nanosheets were uniformly and vertically dispersed on the rGO framework after nitrogen incorporation. The incorporated nitrogen in rGO played a key role for nano-scaling of MoS2 due to the protonation at pyridinic N-doping sites on carbon surface. The vertically aligned edge of nanosized MoS2 sheets, nitrogen incorporation of rGO and 3D network structure made the MoS2/N-rGO highly efficient for hydrogen evolution reaction, with improved double-layer capacitance and turnover frequency, small onset overpotential of 119 mV, low Tafel slope of 36 mV center dot olecade(-1) and superior longtime catalytic stability. (C) 2017 Elsevier Ltd. All rights reserved.