Shape control of Mn3O4 nanoparticles on nitrogen-doped graphene for enhanced oxygen reduction activity

Duan,Jingjing, Chen, Sheng, Dai, Sheng and Qiao, Shi Zhang (2014) Shape control of Mn3O4 nanoparticles on nitrogen-doped graphene for enhanced oxygen reduction activity. Advanced Functional Materials, 24 14: 2072-2078. doi:10.1002/adfm.201302940


Author Duan,Jingjing
Chen, Sheng
Dai, Sheng
Qiao, Shi Zhang
Title Shape control of Mn3O4 nanoparticles on nitrogen-doped graphene for enhanced oxygen reduction activity
Formatted title
Shape control of Mn3O4 nanoparticles on nitrogen-doped graphene for enhanced oxygen reduction activity
Journal name Advanced Functional Materials   Check publisher's open access policy
ISSN 1616-3028
1616-301X
Publication date 2014-04
Year available 2013
Sub-type Article (original research)
DOI 10.1002/adfm.201302940
Open Access Status
Volume 24
Issue 14
Start page 2072
End page 2078
Total pages 7
Place of publication Weinheim Germany
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Collection year 2015
Language eng
Formatted abstract
Three kinds of Mn3O4 nanoparticles with different shapes (spheres, cubes, and ellipsoids) are selectively grown on nitrogen-doped graphene sheets through a two-step liquid-phase procedure. These non-precious hybrid materials display an excellent ORR activity and good durability. The mesoporous microstructure, nitrogen doping, and strong bonding between metal species and doped graphene are found to facilitate the ORR catalytic process. Among these three kinds of Mn3O4 particles, the ellipsoidal particles on nitrogen-doped graphene exhibit the highest ORR activity with a more positive onset-potential of -0.13 V (close to that of Pt/C, -0.09 V) and a higher kinetic limiting current density (JK) of 11.69 mA cm-2 at -0.60 V. It is found that the ORR performance of hybrid materials can be correlated to the shape of Mn3O4 nanocrystals, and specifically to the exposed crystalline facets associated with a given shape. The shape dependence of Mn3O4 nanoparticles integrated with nitrogen-doped graphene on the ORR performance, reported here for the first time, may advance the development of fuel cells and metal-air batteries.
Keyword Catalysis
Nanostructures
Nitrogen doped graphene
Oxygen reduction reaction
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
Australian Institute for Bioengineering and Nanotechnology Publications
 
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