Validity and Reproducibility of Counter Electrodes for Linear Sweep Voltammetry Test in Microbial Electrolysis Cells

Hyungwon Chai, Bonyoung Koo, Sunghoon Son and Sokhee Philemon Jung ()
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Hyungwon Chai: Department of Environment and Energy Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
Bonyoung Koo: Department of Environment and Energy Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
Sunghoon Son: Korean Institute of Energy Research, Jeju 63357, Republic of Korea
Sokhee Philemon Jung: Department of Environment and Energy Engineering, Chonnam National University, Gwangju 61186, Republic of Korea

Energies, 2024, vol. 17, issue 11, 1-16

Abstract: The electrode is a key component in a microbial electrolysis cell (MEC) that needs significant improvement for practical implementation. Accurate and reproducible analytical methods are substantial for the effective development of electrode technology. Linear sweep voltammetry (LSV) is an essential analytical method for evaluating electrode performance. In this study, inoculated carbon brush (IB), abiotic brush (AB), Pt wire (PtW), stainless steel wire (SSW), and mesh (SSM) were tested to find the most suitable counter electrode under different medium conditions. The coefficient of variation ( Cv ) of maximum current (Imax) was the most decisive indicator of the reproducibility test. This study shows that (i) the electrode used in operation is an appropriate counter electrode in an acetate-added condition, (ii) the anode LSV test should avoid the use of Pt wire as counter electrodes, and (iii) PtW is an appropriate counter electrode in cathode LSV in all conditions.

Keywords: microbial electrolysis cells; linear sweep voltammetry; counter electrode; coefficient of variation; reproducibility (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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