Next Article in Journal
Prevention of Community-Acquired Pneumonia with Available Pneumococcal Vaccines
Next Article in Special Issue
A Multiple Reaction Modelling Framework for Microbial Electrochemical Technologies
Previous Article in Journal
Development of Orally Administered γ-Tocotrienol (GT3) Nanoemulsion for Radioprotection
Previous Article in Special Issue
New Electrochemically-Modified Carbon Paste Inclusion β-Cyclodextrin and Carbon Nanotubes Sensors for Quantification of Dorzolamide Hydrochloride
Review

Metal-Free Carbon-Based Materials: Promising Electrocatalysts for Oxygen Reduction Reaction in Microbial Fuel Cells

School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Korea
*
Author to whom correspondence should be addressed.
The authors contributed equally to this work.
Academic Editors: Deepak Pant and Andrea Schievano
Int. J. Mol. Sci. 2017, 18(1), 25; https://doi.org/10.3390/ijms18010025
Received: 28 October 2016 / Revised: 2 December 2016 / Accepted: 9 December 2016 / Published: 24 December 2016
(This article belongs to the Special Issue Bioelectrochemical Systems)
Microbial fuel cells (MFCs) are a promising green approach for wastewater treatment with the simultaneous advantage of energy production. Among the various limiting factors, the cathodic limitation, with respect to performance and cost, is one of the main obstacles to the practical applications of MFCs. Despite the high performance of platinum and other metal-based cathodes, their practical use is limited by their high cost, low stability, and environmental toxicity. Oxygen is the most favorable electron acceptor in the case of MFCs, which reduces to water through a complicated oxygen reduction reaction (ORR). Carbon-based ORR catalysts possessing high surface area and good electrical conductivity improve the ORR kinetics by lowering the cathodic overpotential. Recently, a range of carbon-based materials have attracted attention for their exceptional ORR catalytic activity and high stability. Doping the carbon texture with a heteroatom improved their ORR activity remarkably through the favorable adsorption of oxygen and weaker molecular bonding. This review provides better insight into ORR catalysis for MFCs and the properties, performance, and applicability of various metal-free carbon-based electrocatalysts in MFCs to find the most appropriate cathodic catalyst for the practical applications. The approaches for improvement, key challenges, and future opportunities in this field are also explored. View Full-Text
Keywords: bioelectrochemical systems; electrocatalysis; bio-energy; waste treatment; carbon-based cathodes bioelectrochemical systems; electrocatalysis; bio-energy; waste treatment; carbon-based cathodes
Show Figures

Graphical abstract

MDPI and ACS Style

Sawant, S.Y.; Han, T.H.; Cho, M.H. Metal-Free Carbon-Based Materials: Promising Electrocatalysts for Oxygen Reduction Reaction in Microbial Fuel Cells. Int. J. Mol. Sci. 2017, 18, 25. https://doi.org/10.3390/ijms18010025

AMA Style

Sawant SY, Han TH, Cho MH. Metal-Free Carbon-Based Materials: Promising Electrocatalysts for Oxygen Reduction Reaction in Microbial Fuel Cells. International Journal of Molecular Sciences. 2017; 18(1):25. https://doi.org/10.3390/ijms18010025

Chicago/Turabian Style

Sawant, Sandesh Y., Thi H. Han, and Moo H. Cho 2017. "Metal-Free Carbon-Based Materials: Promising Electrocatalysts for Oxygen Reduction Reaction in Microbial Fuel Cells" International Journal of Molecular Sciences 18, no. 1: 25. https://doi.org/10.3390/ijms18010025

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop