Electrooxidation of Methanol and Ethanol in Alkaline Solutions on Modified Platinum Electrode | ||
| The International Conference on Chemical and Environmental Engineering | ||
| Article 22, Volume 8, 8th International Conference on Chemical & Environmental Engineering, April 2016, Pages 344-369 PDF (2.1 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/iccee.2016.35130 | ||
| Authors | ||
| M. M. Hefny1; S. Abd El Wanees2, 3; Y. Atef4 | ||
| 1Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt. | ||
| 2Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt.+ | ||
| 3Chemistry Department, Faculty of Science, University of Tabuk, Tabuk, Kingdom of Saudi Arabia. | ||
| 4Chemistry Administration, Cairo, Egypt. | ||
| Abstract | ||
| Abstract: This work aims to activate a platinum electrode by repetitive cyclic electrochemical polarization of smooth platinum in alkaline solutions. The resultant modified electrode has been tested as an electro-catalyst for oxidation of candidate fuels, viz. methanol and ethanol. A comparison has been made between the two alcohols with regard to the kinetics of their electro-oxidation. The effect of several kinetic variables has been reported. The results reveal that the modified platinum electrode is a good catalyst for their electro-oxidation in alkaline media. The advantage of this surface is the inhibition of poisoning of Pt by CO intermediate. Change of charge density with number of cycles reveals the extent of increase of surfaces activation is due to increase of surface roughness. The onset potential for the electro-oxidation of ethanol is less than that of methanol on the developed surface. Electro-oxidation in 0.05 M KOH is more feasible than in 0.1 M KOH possibly due to the less adsorption of the hydroxyl ion. | ||
| Keywords | ||
| Methanol electrooxidation; Ethanol electrooxidation; modified platinum; Electrocatalysis | ||
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