Iron Encapsulated within Pod-like Carbon Nanotubes for Oxygen Reduction Reaction


  • We gratefully acknowledge the financial support from the Ministry of Science and Technology of China (No. 2011CBA00503 and 2012CB215500) and the National Science Foundation of China (No. 11079005 and 21033009), and the assistance from Shanghai Synchrontron Radiation Facilities during in situ XANES studies. We thank Hongmei Yu and Ming Hou for help in PEMFC sulfur resistance tests, and Peijun Hu, Meiyin Chou, and Fan Yang for fruitful discussions.


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Chainmail for catalysts: A catalyst with iron nanoparticles confined inside pea-pod-like carbon nanotubes (see picture) exhibits a high activity and remarkable stability as a cathode catalyst in polymer electrolyte membrane fuel cells (PEMFC), even in presence of SO2. The approach offers a new route to electro- and heterogeneous catalysts for harsh conditions.