VN Quantum Dots Anchored Uniformly onto Nitrogen-Doped Graphene as Efficient Electrocatalysts for Oxygen Reduction Reaction | Zendy

Jing Wang | Zendy; Lan Wang | Zendy; Shubin Yang | Zendy

Open Access

VN Quantum Dots Anchored Uniformly onto Nitrogen-Doped Graphene as Efficient Electrocatalysts for Oxygen Reduction Reaction

Author(s) -

Jing Wang,

Lan Wang,

Shubin Yang

Publication year - 2018

Publication title -

nano

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.281

H-Index - 27

eISSN - 1793-7094

pISSN - 1793-2920

DOI - 10.1142/s1793292018500418

Subject(s) - materials science , graphene , vanadium nitride , quantum dot , electrocatalyst , annealing (glass) , nanotechnology , nitride , doping , hydrothermal circulation , chemical engineering , metal , electrode , optoelectronics , electrochemistry , layer (electronics) , composite material , chemistry , engineering , metallurgy

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[Formula: see text]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.

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