Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 170, Issue -, Pages 150-154Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2012.12.003
Keywords
Iron; Carbide; Oxygen reduction reaction; X-ray absorption spectroscopy
Categories
Funding
- Taiwan National Science Council
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The carbons incorporating FeNx electrocatalysts (FeTEPA/C-x) were fabricated via a facile chemical process. The nitrogen-rich species (tetraethylenepentamine) were complexed with iron precursors (FeCl3) on carbon blacks (Vulcan XC-72) and treated under high temperature in a nitrogen atmosphere. These resultant catalysts were characterized by a variety of different spectroscopic and analytical techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) measurements. Experimentally, the electrocatalytic performance of oxygen reduction for FeTEPA/C-2.7, which was found to have an approximate four electron transfer, was observed to be surpassing among all FeTEPA/C-x electrocatalysts. This may be attributed to its unique properties, including the higher nitrogen content, more pyridinic-N sites and probable formation of Fe-N-C active centers which were evidenced by XAS. (C) 2012 Elsevier Inc. All rights reserved.
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