Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells
Oxygen Reduction Reaction (ORR) catalysts, from waste automobile tyres obtained from Microwave assisted pyrolysis (MAP), were enriched with Co and Cu using the simple treatments sonochemical and electrochemical deposition. Catalytic activity was evaluated through onset potential and number of exchan...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/21/5646 |
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| author | Maurizio Passaponti Leonardo Lari Marco Bonechi Francesca Bruni Walter Giurlani Gabriele Sciortino Luca Rosi Lorenzo Fabbri Martina Vizza Vlado K. Lazarov Claudio Fontanesi Massimo Innocenti |
| author_facet | Maurizio Passaponti Leonardo Lari Marco Bonechi Francesca Bruni Walter Giurlani Gabriele Sciortino Luca Rosi Lorenzo Fabbri Martina Vizza Vlado K. Lazarov Claudio Fontanesi Massimo Innocenti |
| author_sort | Maurizio Passaponti |
| collection | DOAJ |
| description | Oxygen Reduction Reaction (ORR) catalysts, from waste automobile tyres obtained from Microwave assisted pyrolysis (MAP), were enriched with Co and Cu using the simple treatments sonochemical and electrochemical deposition. Catalytic activity was evaluated through onset potential and number of exchanged electrons measurements. Electrochemical data demonstrate an improvement in catalytic activity of the electrochemical modified char with Co. Char electrodes enriched with Co show a maximum positive shift of 40 mV with respect to raw char electrodes with a number of exchanged electrons per O<sub>2</sub> molecule close to 4 (as for Pt) for the best sample. This corresponds to a reduction of the production of unwanted oxygen peroxide from 23% for raw char to 1%. Sample structure evolution before and after electrochemical deposition and electro-catalysis was investigated by scanning transmission electron microscopy and XPS. Such electrochemical treatments open new possibilities of refining waste chars and finding an economic alternative to noble metals-based catalysts for alkaline fuel cells. |
| first_indexed | 2024-03-10T15:16:41Z |
| format | Article |
| id | doaj.art-3a61cc8be3b649ff83820f017bee2f94 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T15:16:41Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-3a61cc8be3b649ff83820f017bee2f942023-11-20T18:53:29ZengMDPI AGEnergies1996-10732020-10-011321564610.3390/en13215646Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel CellsMaurizio Passaponti0Leonardo Lari1Marco Bonechi2Francesca Bruni3Walter Giurlani4Gabriele Sciortino5Luca Rosi6Lorenzo Fabbri7Martina Vizza8Vlado K. Lazarov9Claudio Fontanesi10Massimo Innocenti11Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyPhysics Department, University of York, Heslington, York YO10 5DD, UKDepartment of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyPhysics Department, University of York, Heslington, York YO10 5DD, UKDepartment of Engineering ‘Enzo Ferrari’, University of Modena and Reggio Emilia, Via Vivarelli 10, 41125 Modena, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, ItalyOxygen Reduction Reaction (ORR) catalysts, from waste automobile tyres obtained from Microwave assisted pyrolysis (MAP), were enriched with Co and Cu using the simple treatments sonochemical and electrochemical deposition. Catalytic activity was evaluated through onset potential and number of exchanged electrons measurements. Electrochemical data demonstrate an improvement in catalytic activity of the electrochemical modified char with Co. Char electrodes enriched with Co show a maximum positive shift of 40 mV with respect to raw char electrodes with a number of exchanged electrons per O<sub>2</sub> molecule close to 4 (as for Pt) for the best sample. This corresponds to a reduction of the production of unwanted oxygen peroxide from 23% for raw char to 1%. Sample structure evolution before and after electrochemical deposition and electro-catalysis was investigated by scanning transmission electron microscopy and XPS. Such electrochemical treatments open new possibilities of refining waste chars and finding an economic alternative to noble metals-based catalysts for alkaline fuel cells.https://www.mdpi.com/1996-1073/13/21/5646ORRwaste-tyreselectrodepositioncobalt |
| spellingShingle | Maurizio Passaponti Leonardo Lari Marco Bonechi Francesca Bruni Walter Giurlani Gabriele Sciortino Luca Rosi Lorenzo Fabbri Martina Vizza Vlado K. Lazarov Claudio Fontanesi Massimo Innocenti Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells Energies ORR waste-tyres electrodeposition cobalt |
| title | Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells |
| title_full | Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells |
| title_fullStr | Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells |
| title_full_unstemmed | Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells |
| title_short | Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells |
| title_sort | optimisation study of co deposition on chars from map of waste tyres as green electrodes in orr for alkaline fuel cells |
| topic | ORR waste-tyres electrodeposition cobalt |
| url | https://www.mdpi.com/1996-1073/13/21/5646 |
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