Journal article
Understanding the High Activity of Fe-N-C Electrocatalysts in Oxygen Reduction: Fe/Fe3C Nanoparticles Boost the Activity of Fe-Nx
WJ Jiang, L Gu, L Li, Y Zhang, X Zhang, LJ Zhang, JQ Wang, JS Hu, Z Wei, LJ Wan
Journal of the American Chemical Society | AMER CHEMICAL SOC | Published : 2016
DOI: 10.1021/jacs.6b00757
Abstract
Understanding the origin of high activity of Fe-N-C electrocatalysts in oxygen reduction reaction (ORR) is critical but still challenging for developing efficient sustainable nonprecious metal catalysts in fuel cells and metal-air batteries. Herein, we developed a new highly active Fe-N-C ORR catalyst containing Fe-Nx coordination sites and Fe/Fe3C nanocrystals (Fe@C-FeNC), and revealed the origin of its activity by intensively investigating the composition and the structure of the catalyst and their correlations with the electrochemical performance. The detailed analyses unambiguously confirmed the coexistence of Fe/Fe3C nanocrystals and Fe-Nx in the best catalyst. A series of designed expe..
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Awarded by National Natural Science Foundation of China
Funding Acknowledgements
We appreciate the financial support from the National Basic Research Program of China (Grant No. 2015CB932302 and 2012CB215500). National Natural Science Foundation of China (Grant No. 21573249 and 21436003). Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB07030200 and XDB12020100).