期刊
BIOSENSORS & BIOELECTRONICS
卷 58, 期 -, 页码 272-275出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2014.02.073
关键词
Ethylenediamine tetraacetic acid; Catalyst binder; Oxygen reduction reaction; Microbial fuel cell
类别
资金
- National Natural Science Foundation of China [51378143, 51108121, 51208142]
- State Key Laboratory of Urban Water Resource and Environment - [2013TS07]
- National Creative Research Groups - National Natural Science Foundation of China [51121062]
- China Postdoctoral Science Special Foundation
In this study, ethylenediamine tetraacetic acid (EDTA) was investigated as a new kind of non-polymeric catalyst binder to improve interfacial oxygen reduction reaction (ORR) for the cathode of microbial fuel cell (MFC). The electrochemical analysis and MFC tests show negative correlation between ORR activity and molar concentration of EDTA applied during electrode preparation. In particular, the 0.02 mol/L-EDTA yields higher ORR activity than other binder materials like Nafion, water, 0.1 mol/L-EDTA and 02 mol/L-EDTA, as indicated by the strongest response of ORR current and the smallest charge-transfer resistance. Accordingly, the MFC with cathode of 0.02 mol/L-EDTA produced a maximum power density of 722 mW/m(2), accounting for a value approximately 42% higher than that of commercial Nafion binder (5 wff, 507 mW/m(2)). The improved ORR activity should be attributed to the enhanced proton transfer from phosphate ions to EDTA-involved three-phase boundary as a result of dipole ion bonds on nitrogen atoms having unshared pair of electrons in EDTA molecule. (C) 2014 Elsevier B.V. All rights reserved.
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