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
Article Menu
Issue 1 (January) cover image

Export Article

Open AccessReview
Int. J. Mol. Sci. 2017, 18(1), 25; doi:10.3390/ijms18010025

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
The authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Deepak Pant and Andrea Schievano
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)
View Full-Text   |   Download PDF [2974 KB, uploaded 24 December 2016]   |  

Abstract

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
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

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.

Show more citation formats Show less citations formats

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

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top