Use of Pyrolyzed Iron Ethylenediaminetetraacetic Acid Modified Activated Carbon as Air–Cathode Catalyst in Microbial Fuel Cells
Type
ArticleKAUST Grant Number
KUS-I1-003-13Date
2013-08-15Online Publication Date
2013-08-15Print Publication Date
2013-08-28Permanent link to this record
http://hdl.handle.net/10754/600145
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Activated carbon (AC) is a cost-effective catalyst for the oxygen reduction reaction (ORR) in air-cathode microbial fuel cells (MFCs). To enhance the catalytic activity of AC cathodes, AC powders were pyrolyzed with iron ethylenediaminetetraacetic acid (FeEDTA) at a weight ratio of FeEDTA:AC = 0.2:1. MFCs with FeEDTA modified AC cathodes and a stainless steel mesh current collector produced a maximum power density of 1580 ± 80 mW/m2, which was 10% higher than that of plain AC cathodes (1440 ± 60 mW/m 2) and comparable to Pt cathodes (1550 ± 10 mW/m2). Further increases in the ratio of FeEDTA:AC resulted in a decrease in performance. The durability of AC-based cathodes was much better than Pt-catalyzed cathodes. After 4.5 months of operation, the maximum power density of Pt cathode MFCs was 50% lower than MFCs with the AC cathodes. Pyridinic nitrogen, quaternary nitrogen and iron species likely contributed to the increased activity of FeEDTA modified AC. These results show that pyrolyzing AC with FeEDTA is a cost-effective and durable way to increase the catalytic activity of AC. © 2013 American Chemical Society.Citation
Xia X, Zhang F, Zhang X, Liang P, Huang X, et al. (2013) Use of Pyrolyzed Iron Ethylenediaminetetraacetic Acid Modified Activated Carbon as Air–Cathode Catalyst in Microbial Fuel Cells. ACS Applied Materials & Interfaces 5: 7862–7866. Available: http://dx.doi.org/10.1021/am4018225.Sponsors
The authors thank Dr. Jennifer Gray and Dr. Vince Bojan for their assistance with XPS measurement and analysis. This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST), the International Program of MOST (2013DFG92240), and the Program for Changjiang Scholars and Innovative Research Team in University.Publisher
American Chemical Society (ACS)PubMed ID
23902951ae974a485f413a2113503eed53cd6c53
10.1021/am4018225
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