Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 41, Issue 47, Pages 22328-22336Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.08.132
Keywords
Livestock sewage sludge; Honeycomb-like; Electrocatalyst; Oxygen reduction reaction; Microbial fuel cell
Categories
Funding
- National Natural Science Foundation of China [51406207, 51678162]
- Program of Guangdong Province-Chinese Academy of sciences strategic cooperation [2013B091500086]
- National science and technology support [2015BAL04B02]
- innovation carrier construction projects [2013B090800026]
- Chinese academy of sciences scientific research and equipment development project [YZ201516]
- Guangdong Natural Science Funds for Distinguished Young Scholars [2014A030306033]
- Guangdong Science-Technology Project [2015A020215017]
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Cathode catalysts with excellent efficiencies, low costs and long-term durability in microbial fuel cell (MFC) applications have attracted considerable attention. Herein, hierarchically structured carbons with honeycomb-like interconnected macro-mesoporous frameworks and N, P, and Fe heteroatom doping have been successfully prepared through direct pyrolysis from livestock sewage sludge. In neutral media, the as-prepared activated livestock sewage sludge carbon (LSC-A) catalyst displayed great electrocatalytic activity for the oxygen reduction reaction (ORR), and a maximum power density of 1273 +/- 3 mW/m(2) was obtained when this catalyst applied in MFCs, which is comparable to that of commercial Pt/C (1294 +/- 2 mW/m(2)). Furthermore, after 90 days of operation, the voltage output of the MFC with the LSC-A cathode decreased only 10.2%, which is considerably lower than the 28.4% decrease of the Pt/C cathode, indicating that LSC-A possesses a greater long-term stability than the Pt/C cathode. This study demonstrated that the N, P, Fe-doped honeycomb-like hierarchically structured carbon derived from livestock sewage sludge is a costefficient and promising cathode catalyst for scaling up MFCs. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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