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Publication
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| Title of Article |
Development of composite electrodes containing geopolymer binder for electrochemical applications |
| Date of Acceptance |
10 July 2018 |
| Journal |
| Title of Journal |
Journal of Engineering Science and Technology (JESTEC) |
| Standard |
SCOPUS |
| Institute of Journal |
Taylor’s University |
| ISBN/ISSN |
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| Volume |
13 |
| Issue |
10 |
| Month |
October |
| Year of Publication |
2019 |
| Page |
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| Abstract |
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. |
| Keyword |
Cyclic voltammetry, Geopolymer binder, Oxygen evolution reaction, Zinc electrode. |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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