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

Materials

Dusan Losic¹  Diana Tran¹  Tran Thanh Tung¹  Ramesh Karunagaran¹  Cameron Shearer²  Christian Doonan³  Campbell Coghlan³ 

[1] School of Chemical Engineering, University of Adelaide, SA 5005, Australia;School of Chemical and Physical Sciences, Flinders University, SA 5005, Australia;School of Chemistry, University of Adelaide, SA 5005, Australia;

关键词: N-doped carbon spheres;    N-doped carbon nanotubes;    ORR;    hybrid;    catalysts;   

DOI  :  10.3390/ma10080921

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown