Publication: Effect of temperature for platinum/carbon electrocatalyst preparation on hydrogen evolution reaction
Issued Date
2021-01-01
Resource Type
ISSN
01258281
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2-s2.0-85105547034
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Mahidol University
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SCOPUS
Bibliographic Citation
Engineering Journal. Vol.25, No.4 (2021), 105-113
Suggested Citation
Uraiwun Phungjit, Mali Hunsom, Kejvalee Pruksathorn Effect of temperature for platinum/carbon electrocatalyst preparation on hydrogen evolution reaction. Engineering Journal. Vol.25, No.4 (2021), 105-113. doi:10.4186/ej.2021.25.4.105 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/76984
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Title
Effect of temperature for platinum/carbon electrocatalyst preparation on hydrogen evolution reaction
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Abstract
This research was carried out to study the effect of preparation temperature of the Pt/C electrocatalyst on the hydrogen evolution reaction (HER). Pt/C electrocatalyst was synthesized using the polyol method in ethylene glycol with 1 M ascorbic acid as a mild reducing agent. The investigated parameter was the temperature, which will vary from room temperature to 120°C. From the cyclic voltammetry (CV), the results showed that the Pt/C electrocatalyst synthesized by the polyol method at room temperature and 60°C cannot promote hydrogen desorption peak compared to other catalysts. The Pt/C catalyst synthesized at 100°C gave the highest electrochemical surface area (ESA) at around 32.59 m2/gPt. From the linear sweep voltammetry (LSV) tested in an acid solution, the Pt/C catalyst synthesized at 100°C exhibited the highest HER activity. The exchange current density, Tafel slope and overpotential at 10 mA/cm2 were around 5.208 mA/cm2, -59.3 mV/dec and -0.277 VSCE, respectively. From the value of Tafel slope: -59.3 mV/dec, it indicated that the mechanism of the 20%Pt/C electrocatalyst synthesized at 100°C catalyst occurs through Heyrovsky mechanism.