Variation of graphene/titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland-microbial fuel cells
Constructed wetlands-microbial fuel cells (CW-MFC) are an innovative technology used for simultaneous bioelectricity generation and wastewater treatment. This is possible due to the installation of macrophytes in an electrode configuration, in which electroactive microorganisms use organic substrate...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248123001935 |
| _version_ | 1827593645913538560 |
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| author | Oscar Guadarrama-Pérez Victoria Bustos-Terrones Víctor Hugo Guadarrama-Pérez Rosa Angélica Guillén-Garcés Jesús Hernández-Romano Luis Gerardo Treviño-Quintanilla Edson Baltazar Estrada-Arriaga Gabriela Eleonora Moeller-Chávez |
| author_facet | Oscar Guadarrama-Pérez Victoria Bustos-Terrones Víctor Hugo Guadarrama-Pérez Rosa Angélica Guillén-Garcés Jesús Hernández-Romano Luis Gerardo Treviño-Quintanilla Edson Baltazar Estrada-Arriaga Gabriela Eleonora Moeller-Chávez |
| author_sort | Oscar Guadarrama-Pérez |
| collection | DOAJ |
| description | Constructed wetlands-microbial fuel cells (CW-MFC) are an innovative technology used for simultaneous bioelectricity generation and wastewater treatment. This is possible due to the installation of macrophytes in an electrode configuration, in which electroactive microorganisms use organic substrates as biofuel. One way to improve the electrochemical performance of CW-MFCs is through the impregnation of cathodic electrocatalysts. Therefore, in this study the bioelectricity production capacity of CW-MFCs was evaluated from the oxygen reduction reaction (ORR). For this study, the concentrations 0 (CW-MFC1), 0.5 (CW-MFC2), and 1 mg/cm2 (CW-MFC3) of graphene/titanium dioxide (G/TiO2) as electrocatalyst on the cathodes were evaluated. Using the Koutecky-Levich analysis, it was determined that the ORR transfer mechanism arises via a 4-electron pathway. The electrokinetic parameters of Tafel slope, charge transfer coefficient, and exchange current density determined the efficiency of the ORR, registering 92 mV/dec, 0.93 (α), and 2.30 x10-3 mA/cm2, respectively for CW-MFC3. The highest electrochemical performance was obtained at a concentration of 1 mg/cm2 (CW-MFC3) of G/TiO2, generating 144 mW/m2 of power density, 157 Ω of internal resistance, −150 mV of anodic potential, and 383 mV of cathodic potential. The surface modification carried out on the cathodes resulted in a catalytic increase in the ORR. |
| first_indexed | 2024-03-09T02:14:41Z |
| format | Article |
| id | doaj.art-6852a951e4924f8b9f2a3bc5e963e164 |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-03-09T02:14:41Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-6852a951e4924f8b9f2a3bc5e963e1642023-12-07T05:28:03ZengElsevierElectrochemistry Communications1388-24812023-12-01157107618Variation of graphene/titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland-microbial fuel cellsOscar Guadarrama-Pérez0Victoria Bustos-Terrones1Víctor Hugo Guadarrama-Pérez2Rosa Angélica Guillén-Garcés3Jesús Hernández-Romano4Luis Gerardo Treviño-Quintanilla5Edson Baltazar Estrada-Arriaga6Gabriela Eleonora Moeller-Chávez7Dirección de Posgrado en Ciencias en Biotecnología, Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac 566, Lomas del Texcal, Jiutepec, Morelos C.P. 62550, Mexico; Corresponding authors.Dirección de Ingeniería en Tecnología Ambiental y Biotecnología, Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac 566, Lomas del Texcal, Jiutepec, Morelos C.P. 62550, MexicoDirección de Posgrado en Ciencias en Biotecnología, Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac 566, Lomas del Texcal, Jiutepec, Morelos C.P. 62550, MexicoDirección de Ingeniería en Tecnología Ambiental y Biotecnología, Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac 566, Lomas del Texcal, Jiutepec, Morelos C.P. 62550, MexicoDirección de Ingeniería en Tecnología Ambiental y Biotecnología, Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac 566, Lomas del Texcal, Jiutepec, Morelos C.P. 62550, MexicoDirección de Ingeniería en Tecnología Ambiental y Biotecnología, Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac 566, Lomas del Texcal, Jiutepec, Morelos C.P. 62550, MexicoSubcoordinación de Tratamiento de Aguas Residuales, Instituto Mexicano de Tecnología del Agua, Paseo Cuauhnáhuac 8532, Progreso, Jiutepec, Morelos. C.P. 62550, MexicoDirección de Ingeniería en Tecnología Ambiental y Biotecnología, Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac 566, Lomas del Texcal, Jiutepec, Morelos C.P. 62550, Mexico; Corresponding authors.Constructed wetlands-microbial fuel cells (CW-MFC) are an innovative technology used for simultaneous bioelectricity generation and wastewater treatment. This is possible due to the installation of macrophytes in an electrode configuration, in which electroactive microorganisms use organic substrates as biofuel. One way to improve the electrochemical performance of CW-MFCs is through the impregnation of cathodic electrocatalysts. Therefore, in this study the bioelectricity production capacity of CW-MFCs was evaluated from the oxygen reduction reaction (ORR). For this study, the concentrations 0 (CW-MFC1), 0.5 (CW-MFC2), and 1 mg/cm2 (CW-MFC3) of graphene/titanium dioxide (G/TiO2) as electrocatalyst on the cathodes were evaluated. Using the Koutecky-Levich analysis, it was determined that the ORR transfer mechanism arises via a 4-electron pathway. The electrokinetic parameters of Tafel slope, charge transfer coefficient, and exchange current density determined the efficiency of the ORR, registering 92 mV/dec, 0.93 (α), and 2.30 x10-3 mA/cm2, respectively for CW-MFC3. The highest electrochemical performance was obtained at a concentration of 1 mg/cm2 (CW-MFC3) of G/TiO2, generating 144 mW/m2 of power density, 157 Ω of internal resistance, −150 mV of anodic potential, and 383 mV of cathodic potential. The surface modification carried out on the cathodes resulted in a catalytic increase in the ORR.http://www.sciencedirect.com/science/article/pii/S1388248123001935Oxygen reduction reactionBioelectricityMechanism electron transferConstructed wetland-microbial fuel cells |
| spellingShingle | Oscar Guadarrama-Pérez Victoria Bustos-Terrones Víctor Hugo Guadarrama-Pérez Rosa Angélica Guillén-Garcés Jesús Hernández-Romano Luis Gerardo Treviño-Quintanilla Edson Baltazar Estrada-Arriaga Gabriela Eleonora Moeller-Chávez Variation of graphene/titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland-microbial fuel cells Electrochemistry Communications Oxygen reduction reaction Bioelectricity Mechanism electron transfer Constructed wetland-microbial fuel cells |
| title | Variation of graphene/titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland-microbial fuel cells |
| title_full | Variation of graphene/titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland-microbial fuel cells |
| title_fullStr | Variation of graphene/titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland-microbial fuel cells |
| title_full_unstemmed | Variation of graphene/titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland-microbial fuel cells |
| title_short | Variation of graphene/titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland-microbial fuel cells |
| title_sort | variation of graphene titanium dioxide concentration as electrocatalyst for an oxygen reduction reaction in constructed wetland microbial fuel cells |
| topic | Oxygen reduction reaction Bioelectricity Mechanism electron transfer Constructed wetland-microbial fuel cells |
| url | http://www.sciencedirect.com/science/article/pii/S1388248123001935 |
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