articleJournal of the American Chemical SocietyJan 23, 2012Closed access

Covalent Hybrid of Spinel Manganese–Cobalt Oxide and Graphene as Advanced Oxygen Reduction Electrocatalysts

YLYongye LiangHWHailiang WangJZJigang ZhouYLYanguang LiJWJian Wang

Stanford University · Canadian Light Source (Canada)

PubMed
Indexed incrossrefpubmed

Abstract

Through direct nanoparticle nucleation and growth on nitrogen doped, reduced graphene oxide sheets and cation substitution of spinel Co(3)O(4) nanoparticles, a manganese-cobalt spinel MnCo(2)O(4)/graphene hybrid was developed as a highly efficient electrocatalyst for oxygen reduction reaction (ORR) in alkaline conditions. Electrochemical and X-ray near-edge structure (XANES) investigations revealed that the nucleation and growth method for forming inorganic-nanocarbon hybrids results in covalent coupling between spinel oxide nanoparticles and N-doped reduced graphene oxide (N-rmGO) sheets. Carbon K-edge and nitrogen K-edge XANES showed strongly perturbed C-O and C-N bonding in the N-rmGO sheet, suggesting the…

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1,369
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Authors

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Topics & keywords

Topics
Keywords
  • Graphene
  • Chemistry
  • Oxide
  • XANES
  • Electrocatalyst
  • Spinel
  • Inorganic chemistry
  • Nanoparticle
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