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- W2000559255 abstract "The effect of the diameter of multiwalled carbon nanotubes for the incorporation of N and Fe and the consequences for the oxygen reduction reaction in acid medium has been studied. For this, a series of multiwalled carbon nanotubes with mean diameters of 10, 20 and 60 nm have been thermally treated in acid media and modified by addition of N- and Fe-groups by means of thermal treatments under inert atmosphere. The chemically treated nanotubes and the FeN-CNTs have been thoroughly characterized by N2 adsorption/desorption isotherms, Raman spectroscopy, X-ray photoelectron spectroscopy, elemental analysis, thermogravimetric analysis and X-ray diffraction. The performance of the FeN-CNTs for the oxygen reduction reaction (ORR) in acid medium has been evaluated by means of electrochemical techniques. We have found that the amount of nitrogen actually incorporated onto the multiwalled carbon nanotubes, which ranges between 2 and 3 wt.%, can be directly related with the number of defects of the chemically treated multiwalled nanotubes. On the other hand, the BET specific surface area of the FeN-CNTs increases with the decreasing diameter of the CNTs. A direct relationship between the nitrogen external surface area and the ORR performance has been observed." @default.
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- W2000559255 date "2013-10-01" @default.
- W2000559255 modified "2023-09-24" @default.
- W2000559255 title "Effect of carbon nanotube diameter for the synthesis of Fe/N/multiwall carbon nanotubes and repercussions for the oxygen reduction reaction" @default.
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- W2000559255 doi "https://doi.org/10.1016/j.jpowsour.2013.04.086" @default.
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