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Hongliang PENG, Guanghua WANG, Pengru HUANG, Fen XU, Lixian SUN and Shijun LIAO; Why nitrogen and fluorine co-doped carbon catalysts have high performance for oxygen reduction: Experimental and theoretical study; Advanced NanoMaterials and Technologies for Energy Sector; 2017:1(3):135-149
The nitrogen and fluorine co-doped carbon catalyst (C-Mela-PTFE) exhibits high performance for oxygen reduction. However, the mechanism is remained elusive. Here, we investigate the structure and oxygen chemisorption processes of C-Mela-PTFE by experimental and theoretical methods. The results show that the C-Mela-PTFE materials exhibit layered porous structure, which facilitates the diffusion of oxygen. Compare N-doped catalyst, the N and F co-doped can reduce the energy barrier (from 1.08 eV to 0.23 eV) in oxygen adsorption process. In addition, the oxygen chemisorption on C-Mela-PTFE is following the side-on adsorption model (Yeager model).