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Materials 2017, 10(8), 921;

A Unique 3D Nitrogen-Doped Carbon Composite as High-Performance Oxygen Reduction Catalyst

School of Chemical Engineering, University of Adelaide, SA 5005, Australia
School of Chemistry, University of Adelaide, SA 5005, Australia
School of Chemical and Physical Sciences, Flinders University, SA 5005, Australia
Authors to whom correspondence should be addressed.
Received: 8 July 2017 / Revised: 1 August 2017 / Accepted: 4 August 2017 / Published: 9 August 2017
(This article belongs to the Section Advanced Composites)
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The synthesis and properties of an oxygen reduction catalyst based on a unique 3-dimensional (3D) nitrogen doped (N-doped) carbon composite are described. The composite material is synthesised via a two-step hydrothermal and pyrolysis method using bio-source low-cost materials of galactose and melamine. Firstly, the use of iron salts and galactose to hydrothermally produceiron oxide (Fe2O3) magnetic nanoparticle clusters embedded carbon spheres. Secondly, magnetic nanoparticles diffused out of the carbon sphere when pyrolysed in the presence of melamine as nitrogen precursor. Interestingly, many of these nanoparticles, as catalyst-grown carbon nanotubes (CNTs), resulted in the formation of N-doped CNTs and N-doped carbon spheres under the decomposition of carbon and a nitrogen environment. The composite material consists of integrated N-doped carbon microspheres and CNTs show high ORR activity through a predominantly four-electron pathway. View Full-Text
Keywords: N-doped carbon spheres; N-doped carbon nanotubes; ORR; hybrid; catalysts N-doped carbon spheres; N-doped carbon nanotubes; ORR; hybrid; catalysts

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Karunagaran, R.; Tung, T.T.; Shearer, C.; Tran, D.; Coghlan, C.; Doonan, C.; Losic, D. A Unique 3D Nitrogen-Doped Carbon Composite as High-Performance Oxygen Reduction Catalyst. Materials 2017, 10, 921.

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