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Fe7C3–Fe3N/FeNxCy Decorated Carbon Material as Highly Efficient Catalyst for Oxygen Reduction Reaction in Al-Air Batteries

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Traditionally, oxygen reduction reactions (ORR) are catalyzed by Pt/C, which is expensive but essentially efficient catalyst. So doping of highly active moieties onto carbon supports could be investigated as a practical and inexpensive strategy for catalysis of ORR. The present study reported noncrystalline FeN x C y species, crystalline Fe7C3 and Fe3N nanoparticles co-decorated ketjenblack (KB) carbon catalyst (denoted as Fe–N–KB–HCl) for ORR prepared using ferrous sulfate, melamine and KB as raw materials. Carbon nanotubes (CNT) were observed in the catalyst, which caused to a high specific surface area (1125 m2g–1) of the catalyst. The Fe–N–KB–HCl catalyst fabricated in this study exhibited a catalytic performance similar to that of commercial 20% Pt/C for ORR in alkaline solution. Moreover, it exhibited a higher voltage (1.51 V) at a discharge density of 50 mA cm–2 in an in-house made Al-air battery than that of the commercial 20% Pt/C catalyst (1.45 V). So the Fe–N–KB–HCl catalyst prepared in this study could be used for developing inexpensive but highly efficient catalysts for catalysis of ORR and have potential to be used for commercial purposes.
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Keywords: AL-AIR BATTERIES; ELECTROCATALYST; IRON CARBIDE; IRON NITRIDE; IRON-NITROGEN DOPING; OXYGEN REDUCTION REACTION

Document Type: Review Article

Publication date: 01 December 2017

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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