DEVELOPMENT OF COMPOSITE ELECTRODES CONTAINING GEOPOLYMER BINDER FOR ELECTROCHEMICAL APPLICATIONS
The requirements for electrode materials are high electronic conductivity, fast kinetics, high mechanical stability, and high chemical stability under oxidative and reductive environment. In this work, composite electrodes have been prepared containing geopolymer (made from Fly Ash (FA)), zinc, and...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor's University
2018-10-01
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| Series: | Journal of Engineering Science and Technology |
| Subjects: | |
| Online Access: | http://jestec.taylors.edu.my/Vol%2013%20issue%2010%20October%202018/13_10_02.pdf |
| _version_ | 1819071063713120256 |
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| author | SAWITTA TRIAMTHAISONG CHAIYAPUT KRUEHONG WIRAT JARERNBOON VITTAYA AMORNKITBAMRUNG PRINYA CHINDAPRASIRT KAEWTA JETSRISUPARB |
| author_facet | SAWITTA TRIAMTHAISONG CHAIYAPUT KRUEHONG WIRAT JARERNBOON VITTAYA AMORNKITBAMRUNG PRINYA CHINDAPRASIRT KAEWTA JETSRISUPARB |
| author_sort | SAWITTA TRIAMTHAISONG |
| collection | DOAJ |
| description | The requirements for electrode materials are high electronic conductivity, fast kinetics, high mechanical stability, and high chemical stability under oxidative and reductive environment. In this work, composite electrodes have been prepared containing geopolymer (made from Fly Ash (FA)), zinc, and Multiwalled Carbon Nanotubes (MWCNT) or graphite deposited on a nickel foam with different compositions (FA:Zn:MWCNT or FA:Zn:Graphite, mass ratio = 12:6:1 or 6:6:1). While the commercial zinc plate demonstrated clear oxidation and reduction reactions during cyclic voltammetry, no electrochemical reactions of zinc were observed with the composite electrodes. The composite electrodes suffered from high resistance, which could not be overcome even with reduced geopolymer content. The FE-SEM images indicated that the composite electrodes containing MWCNT were better dispersed than those containing graphite. Moreover, the composite electrode containing FA:Zn:MWCNT = 6:6:1 showed a lower overpotential for Oxygen Evolution Reaction (OER) compared to those with FA:Zn:Graphite at the same mass ratio. The surface morphology, homogeneity and chemical compositions lead to the change of the electrocatalyst activity towards OER. The electrode containing MWCNT may be attractive as anode for alkaline water electrolysis for hydrogen production. Further experiments should focus on optimization of the electrode composition to enhance its conductivity, activity and stability. |
| first_indexed | 2024-12-21T17:15:53Z |
| format | Article |
| id | doaj.art-8415f5edb50d41568dd3140d902227fd |
| institution | Directory Open Access Journal |
| issn | 1823-4690 |
| language | English |
| last_indexed | 2024-12-21T17:15:53Z |
| publishDate | 2018-10-01 |
| publisher | Taylor's University |
| record_format | Article |
| series | Journal of Engineering Science and Technology |
| spelling | doaj.art-8415f5edb50d41568dd3140d902227fd2022-12-21T18:56:18ZengTaylor's UniversityJournal of Engineering Science and Technology1823-46902018-10-01131030173028DEVELOPMENT OF COMPOSITE ELECTRODES CONTAINING GEOPOLYMER BINDER FOR ELECTROCHEMICAL APPLICATIONSSAWITTA TRIAMTHAISONG0CHAIYAPUT KRUEHONG1WIRAT JARERNBOON2VITTAYA AMORNKITBAMRUNG3PRINYA CHINDAPRASIRT4KAEWTA JETSRISUPARB5Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40002, ThailandDepartment of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40002, ThailandDepartment of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, ThailandDepartment of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, ThailandDepartment of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40002, ThailandSustainable Infrastructure Research and Development Center, Khon Kaen University, Khon Kaen, 40002, ThailandThe requirements for electrode materials are high electronic conductivity, fast kinetics, high mechanical stability, and high chemical stability under oxidative and reductive environment. In this work, composite electrodes have been prepared containing geopolymer (made from Fly Ash (FA)), zinc, and Multiwalled Carbon Nanotubes (MWCNT) or graphite deposited on a nickel foam with different compositions (FA:Zn:MWCNT or FA:Zn:Graphite, mass ratio = 12:6:1 or 6:6:1). While the commercial zinc plate demonstrated clear oxidation and reduction reactions during cyclic voltammetry, no electrochemical reactions of zinc were observed with the composite electrodes. The composite electrodes suffered from high resistance, which could not be overcome even with reduced geopolymer content. The FE-SEM images indicated that the composite electrodes containing MWCNT were better dispersed than those containing graphite. Moreover, the composite electrode containing FA:Zn:MWCNT = 6:6:1 showed a lower overpotential for Oxygen Evolution Reaction (OER) compared to those with FA:Zn:Graphite at the same mass ratio. The surface morphology, homogeneity and chemical compositions lead to the change of the electrocatalyst activity towards OER. The electrode containing MWCNT may be attractive as anode for alkaline water electrolysis for hydrogen production. Further experiments should focus on optimization of the electrode composition to enhance its conductivity, activity and stability.http://jestec.taylors.edu.my/Vol%2013%20issue%2010%20October%202018/13_10_02.pdfCyclic voltammetryGeopolymer binderOxygen evolution reactionZinc electrode |
| spellingShingle | SAWITTA TRIAMTHAISONG CHAIYAPUT KRUEHONG WIRAT JARERNBOON VITTAYA AMORNKITBAMRUNG PRINYA CHINDAPRASIRT KAEWTA JETSRISUPARB DEVELOPMENT OF COMPOSITE ELECTRODES CONTAINING GEOPOLYMER BINDER FOR ELECTROCHEMICAL APPLICATIONS Journal of Engineering Science and Technology Cyclic voltammetry Geopolymer binder Oxygen evolution reaction Zinc electrode |
| title | DEVELOPMENT OF COMPOSITE ELECTRODES CONTAINING GEOPOLYMER BINDER FOR ELECTROCHEMICAL APPLICATIONS |
| title_full | DEVELOPMENT OF COMPOSITE ELECTRODES CONTAINING GEOPOLYMER BINDER FOR ELECTROCHEMICAL APPLICATIONS |
| title_fullStr | DEVELOPMENT OF COMPOSITE ELECTRODES CONTAINING GEOPOLYMER BINDER FOR ELECTROCHEMICAL APPLICATIONS |
| title_full_unstemmed | DEVELOPMENT OF COMPOSITE ELECTRODES CONTAINING GEOPOLYMER BINDER FOR ELECTROCHEMICAL APPLICATIONS |
| title_short | DEVELOPMENT OF COMPOSITE ELECTRODES CONTAINING GEOPOLYMER BINDER FOR ELECTROCHEMICAL APPLICATIONS |
| title_sort | development of composite electrodes containing geopolymer binder for electrochemical applications |
| topic | Cyclic voltammetry Geopolymer binder Oxygen evolution reaction Zinc electrode |
| url | http://jestec.taylors.edu.my/Vol%2013%20issue%2010%20October%202018/13_10_02.pdf |
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