• 文献标题:   VN Quantum Dots Anchored Uniformly onto Nitrogen-Doped Graphene as Efficient Electrocatalysts for Oxygen Reduction Reaction
  • 文献类型:   Article
  • 作  者:   WANG J, WANG L, YANG SB
  • 作者关键词:   vn, quantum dot, orr electrocatalysi, nitrogendoped graphene
  • 出版物名称:   NANO
  • ISSN:   1793-2920 EI 1793-7094
  • 通讯作者地址:   Beihang Univ
  • 被引频次:   1
  • DOI:   10.1142/S1793292018500418
  • 出版年:   2018

▎ 摘  要

A new type of vanadium nitride quantum dots anchored homogeneously onto nitrogen-doped graphene (VNQD-NG) is fabricated as nonprecious metal-based electrocatalysts for ORR via a combined hydrothermal and ammonia annealing process. The unique structural features of VNQD-NG including plentiful VN quantum dots with the sizes of 3-6 nm, high surface area and multi-level pores afford considerable structural edges and defects as active sites, maximizing the exposed active sites and providing sufficient electron transport pathways for ORR. Hence, the optimized VNQD-NG exhibits high electrocatalytic activity, long durability and high selectivity for ORR, better than commercially available Pt-C.