Synthesis of amino-functionalized graphene as metal-free catalyst and exploration of the roles of various nitrogen states in oxygen reduction reaction

Our experiments show that the graphitic- and amino-type of nitrogen components determine the onset potential and electron transfer number, while the total content of graphitic and pyridinic nitrogen atoms is the key factor to enhance the current density in the electrocatalytic activity for oxygen reduction reaction

Chenzhen Zhang; Rui Hao; Hanbin Liao; Yanglong Hou

2012

Scholarcy highlights

  • Nitrogen-containing graphene is a promising candidate for oxygen reduction reaction in fuel cells
  • Having a significant amount of amino species with the total nitrogen content of up to 10.6%, the resultant product can act as an efficient metal-free catalyst, exhibiting enhanced electrocatalytic properties for ORR
  • A combination of X-ray photoelectron spectroscopy and electrochemical measurements was used to investigate the roles of various nitrogen states in ORR, and the contribution of amino group has been demonstrated for the first time
  • Our experiments show that the graphitic- and amino-type of nitrogen components determine the onset potential and electron transfer number, while the total content of graphitic and pyridinic nitrogen atoms is the key factor to enhance the current density in the electrocatalytic activity for ORR
  • The resultant product can act as an efficient metal-free catalyst for oxygen reduction reaction, and the amino species in graphene structure has a proven enhanced electrocatalytic activity towards ORR
  • ► We design a simple solvothermal method to synthesize amino-functionalized graphene as metal-free catalyst for oxygen reduction reaction. ► The amino group in AG makes a great contribution to ORR performance. ► The graphitic and amino N atoms determine the onset potential and electron transfer number in ORR. ► The graphitic and pyridinic N atoms are the key factor to enhance the current density in ORR
  • His research interests include the design and chemical synthesis of functional nanoparticles and graphene, and their biomedical and energy related applications

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