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Nanotubular MnO2/graphene oxide composites for the application of open air-breathing cathode microbial fuel cells
- Source :
- Biosensorsbioelectronics. 53
- Publication Year :
- 2013
-
Abstract
- Nanotubular shaped α-MnO2/graphene oxide nanocomposites were synthesized via a simple, cost and time efficient hydrothermal method. The growth of hollow structured MnO2 nanotubes preferentially occurred along the [001] direction as evidenced from the morphological and structural characterizations. The tunnels of α-MnO2 nanotubes easily accommodated the molecular oxygen and exhibited excellent catalytic activity towards the oxygen reduction reaction over the rod structure and was further enhanced with the effective carbon support graphene oxide. The MnO2 nanotubes/graphene oxide nanocomposite modified electrode exhibited a maximum power density of 3359 mW m(-2) which is 7.8 fold higher than that of unmodified electrode and comparable with the Pt/C modified electrode. The microbial fuel cell equipped with MnO2 nanotubes/graphene oxide nanocomposite modified cathode exhibited quick start up and excellent durability over the studied electrodes and is attributed to the high surface area and number of active sites. These findings not only provide the fundamental studies on carbon supported low-dimensional transition-metal oxides but also open up the new possibilities of their applications in green energy devices.
- Subjects :
- Materials science
Bioelectric Energy Sources
Biomedical Engineering
Biophysics
Oxide
Biosensing Techniques
law.invention
Nanomaterials
Nanocomposites
chemistry.chemical_compound
law
Electrochemistry
Composite material
Particle Size
Electrodes
Graphene oxide paper
Nanocomposite
Graphene
Nanotubes, Carbon
Graphene foam
Oxides
General Medicine
Cathode
Oxygen
chemistry
Manganese Compounds
Graphite
Graphene nanoribbons
Biotechnology
Subjects
Details
- ISSN :
- 18734235
- Volume :
- 53
- Database :
- OpenAIRE
- Journal :
- Biosensorsbioelectronics
- Accession number :
- edsair.doi.dedup.....c4f24dda26bf29ffca960c1c33306aeb