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Porous Hollow‐Structured LaNiO 3 Stabilized N,S‐Codoped Graphene as an Active Electrocatalyst for Oxygen Reduction Reaction
Author(s) -
Thanh Tran Duy,
Chuong Nguyen Dinh,
Balamurugan Jayaraman,
Van Hien Hoa,
Kim Nam Hoon,
Lee Joong Hee
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201701884
Subject(s) - electrocatalyst , materials science , graphene , catalysis , chemical engineering , heteroatom , electrochemistry , specific surface area , lanio , inorganic chemistry , nanotechnology , chemistry , electrode , organic chemistry , ring (chemistry) , optoelectronics , dielectric , engineering , ferroelectricity
Abstract A nanohybrid based on porous and hollow interior structured LaNiO 3 stabilized nitrogen and sulfur codoped graphene (LaNiO 3 /N,S‐Gr) is successfully synthesized for the first time. Such a nanohybrid as an electrocatalyst shows high catalytic activity for oxygen reduction reaction (ORR) in O 2 ‐saturated 0.1 m KOH media. In addition, it demonstrates a comparable catalytic activity, longer working stability, and much better alcohol tolerance compared with commercial Pt/C behavior in same experiment condition. The obtained results are attributed to synergistic effects from the enhanced electrocatalytic active sites on the rich pore channels of porous hollow‐structured LaNiO 3 spheres and heteroatom doped efficiency on graphene structure. In addition, N,S‐Gr can meritoriously stabilize monodispersion of the LaNiO 3 spheres, and act as medium bridging for high electrical conductivity, thereby providing large active surface area for O 2 adsorption, accelerating reduction reaction, and improving electrochemical stability. Such a hybrid opens an interesting class of highly efficient non‐Pt catalysts for ORR in alkaline media.