Journal
SMALL
Volume 13, Issue 39, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201701884
Keywords
electrocatalyst; N; S-codoped graphene; oxygen reduction reaction; porous hollow LaNiO3
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Funding
- Basic Research Program through the National Research Foundation (NRF) - Ministry of Science, ICT & Future Planning of Republic of Korea [NRF-2017R1A2B3004917]
- National Research Foundation of Korea [2017R1A2B3004917] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A nanohybrid based on porous and hollow interior structured LaNiO3 stabilized nitrogen and sulfur codoped graphene (LaNiO3/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 LaNiO3 spheres and heteroatom doped efficiency on graphene structure. In addition, N,S-Gr can meritoriously stabilize monodispersion of the LaNiO3 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.
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