DOI: 10.1016/j.watres.2018.10.022
Scopus记录号: 2-s2.0-85055026857
论文题名: Evaluating a multi-panel air cathode through electrochemical and biotic tests
作者: Rossi R. ; Jones D. ; Myung J. ; Zikmund E. ; Yang W. ; Gallego Y.A. ; Pant D. ; Evans P.J. ; Page M.A. ; Cropek D.M. ; Logan B.E.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 148 起始页码: 51
结束页码: 59
语种: 英语
英文关键词: Air cathode
; Chronopotentiometry
; MFC
; Scaling up
; Wastewater
Scopus关键词: Anodes
; Cathodes
; Dissolved oxygen
; Electrolytes
; Sheet metal
; Wastewater
; Welding electrodes
; Air cathode
; Chronopotentiometry
; Electrical conductivity
; Electrochemical performance
; Maximum power density
; Microbial fuel cells (MFCs)
; Phosphate buffer solutions
; Scaling-up
; Microbial fuel cells
; buffer
; dissolved oxygen
; phosphate
; dissolved oxygen
; electrical conductivity
; electrochemical method
; electrode
; experimental design
; fuel cell
; performance assessment
; scale effect
; testing method
; wastewater treatment
; air
; Article
; catalyst
; current density
; electric conductivity
; electrochemical analysis
; microbial fuel cell
; polarization
; reactor operation
; scale up
; waste water
英文摘要: To scale up microbial fuel cells (MFCs), larger cathodes need to be developed that can use air directly, rather than dissolved oxygen, and have good electrochemical performance. A new type of cathode design was examined here that uses a “window-pane” approach with fifteen smaller cathodes welded to a single conductive metal sheet to maintain good electrical conductivity across the cathode with an increase in total area. Abiotic electrochemical tests were conducted to evaluate the impact of the cathode size (exposed areas of 7 cm2, 33 cm2, and 6200 cm2) on performance for all cathodes having the same active catalyst material. Increasing the size of the exposed area of the electrodes to the electrolyte from 7 cm2 to 33 cm2 (a single cathode panel) decreased the cathode potential by 5%, and a further increase in size to 6200 cm2 using the multi-panel cathode reduced the electrode potential by 55% (at 0.6 A m−2), in a 50 mM phosphate buffer solution (PBS). In 85 L MFC tests with the largest cathode using wastewater as a fuel, the maximum power density based on polarization data was 0.083 ± 0.006 W m−2 using 22 brush anodes to fully cover the cathode, and 0.061 ± 0.003 W m−2 with 8 brush anodes (40% of cathode projected area) compared to 0.304 ± 0.009 W m−2 obtained in the 28 mL MFC. Recovering power from large MFCs will therefore be challenging, but several approaches identified in this study can be pursued to maintain performance when increasing the size of the electrodes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122228
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, The Pennsylvania State University, University ParkPA 16802, United States; Department of Civil and Environmental Engineering, Southern Methodist University, Dallas, TX 75205, United States; Separation & Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol2400, Belgium; CDM Smith, Bellevue, WA 98007, United States; U.S. Army Corps of Engineers, Engineer Research and Development Center, Construction Engineering Research Laboratory, Champaign, IL 61822, United States
Recommended Citation:
Rossi R.,Jones D.,Myung J.,et al. Evaluating a multi-panel air cathode through electrochemical and biotic tests[J]. Water Research,2019-01-01,148