Effects of N-doping Methods on the Microstructure and Oxygen Reduction Performance of Carbon Materials

Gui Hui Chen, Long He, Guo Zhen Zhang

Abstract


The ongoing search for new non-precious-metal catalysts with excellent electrocatalytic performance to replace Pt-based catalysts is viewed as an important strategy to promote the development of fuel cells. In here, N-doped carbon materials are fabricated by different methods and used as electrocatalysts for oxygen reduction reaction (ORR). The resulting samples are systemically characterized by XRD, SEM, TEM, Raman, XPS and electrochemical measurements to study the synthesis-structure-performance correlation of the N-doped carbon materials for ORR. The experimental results indicates that the synthesis methods have an significantly impact on the bonding state of nitrogen atom in resulting carbon materials, microstructure and electro-catalytic performance of products, and confirms that the obtained 3D interpenetrating microstructured N-doped graphene has an excellent catalytic activity for ORR due to its well-developed porous nanostructures and interconnected conductive networks could provide more electroactive sites and fast ionic channels for electrochemical reaction.


DOI
10.12783/dtetr/apetc2017/10904

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