Effect of Temperature for Platinum/Carbon Electrocatalyst Preparation on Hydrogen Evolution Reaction

Authors

  • Uraiwun Phungjit Chulalongkorn University
  • Mali Hunsom Mahidol University
  • Kejvalee Pruksathorn Chulalongkorn University

DOI:

https://doi.org/10.4186/ej.2021.25.4.105

Keywords:

Pt/C electrocatalyst, polyol method, ascorbic acid, hydrogen evolution

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.

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Author Biographies

Uraiwun Phungjit
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Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand

Center of Excellent on Petrochemical and Materials Technology, Chulalongkorn University, Soi Chula 12, Phayathai Road, Pathumwan, Bangkok 10330, Thailand

Mali Hunsom
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Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakorn Pathom 73170, Thailand

Associate Fellow of Royal Society of Thailand (AFRST), Bangkok 10300, Thailand

Kejvalee Pruksathorn
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Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand

Center of Excellent on Petrochemical and Materials Technology, Chulalongkorn University, Soi Chula 12, Phayathai Road, Pathumwan, Bangkok 10330, Thailand

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Published In
Vol 25 No 4, Apr 30, 2021
How to Cite
[1]
U. Phungjit, M. Hunsom, and K. Pruksathorn, “Effect of Temperature for Platinum/Carbon Electrocatalyst Preparation on Hydrogen Evolution Reaction”, Eng. J., vol. 25, no. 4, pp. 105-113, Apr. 2021.
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