Shape Control of Mn3O4 Nanoparticles on Nitrogen‐Doped Graphene for Enhanced Oxygen Reduction Activity
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.
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Pyridinic nitrogen is useful for acting as anchoring sites for the growth of nanoparticles due to its coordination capabilities.
“Pyridinic nitrogen is useful for acting as anchoring sites for the growth of nanoparticles due to its coordination capabilities.33,34”
From Tunable CoFe-based active sites on 3D heteroatom doped graphene aerogel electrocatalysts <i>via</i> annealing gas regulation for efficient water splitting (2018) · cites this paper as [34]
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High oxygen-reduction activity and durability of nitrogen-doped graphene
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Oxygen Reduction in Alkaline Media: From Mechanisms to Recent Advances of Catalysts
Ge, X., Sumboja, A., Wuu, D., An, T., Li, B., Goh, F. W. T., Hor, T. S. A., Zong, Y., & Liu, Z. (2015) · ACS Catalysis · doi:10.1021/acscatal.5b00524 · Cited by 1,341 · see citing works
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- Authors
- Duan, J., Chen, S., Dai, S., & Qiao, S. Z.
- Affiliations
- The University of Adelaide (AU)
- Corresponding author
- Qiao, Shi Zhang
- Venue
- Advanced Functional Materials
- Publisher
- Wiley
- Published
- 2013-11-29
- Volume
- 24
- Issue
- 14
- Pages
- 2072-2078
- ISSN
- 1616-301X (ISSN-L)
- 1616-3028
- OpenAlex
- W2032902984
- Cited by
- 300
- References
- 3
- Citations by year
- 2026: 3 · 2025: 7 · 2024: 14 · 2023: 6 · 2022: 10 · 2021: 14 · 2020: 25 · 2019: 25 · 2018: 49 · 2017: 45 · 2016: 44 · 2015: 44 · 2014: 14
- FWCI
- 12.34
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Advanced Functional Materials (publishedVersion)
- Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion)
- Funders
- Australian Research Council
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Supercapacitor Materials and Fabrication
- Keywords
- Mn3O4 nanoparticles, nitrogen-doped graphene, oxygen reduction reaction, nanoparticle shape control, ellipsoidal particles, non-precious metal electrocatalysts, fuel cells, metal-air batteries
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