International Journal of Industrial Engineering
International Journal of Industrial Engineering, Vol. 1, No. 2, 2017, Pages 52-61.
Performance of sea water supported Pt–Sn–Mg/C catalyst for membraneless fuel cells
S. P. R. Kalaikathir, S. Begila David
Department of Chemistry, Women’s Christian College, Nagercoli – 629 003, India.
*Corresponding author’s e-mail: email@example.com
The present work reports the performance of Pt–Sn–Mg/C ternary electrocatalysts on ethanol oxidation reaction in membraneless fuel cells prepared by thermal reduction method. A systematic investigation of ethanol adsorption and oxidation on binary and ternary electrocatalysts in sea water was performed in membraneless ethanol fuel cells. The different nominal compositions of binary Pt–Sn/C, Pt–Mg/C, and ternary Pt–Sn–Mg/C electrocatalysts were characterized by XRD, EDX, and TEM techniques. XRD and EDX confirmed the formation of Pt–Sn–Mg/C, Pt–Sn/C, and Pt–Mg/C metal catalyst with a typical Pt crystalline structure and the formation of Pt–Sn alloy. Electrochemical analyses obtained at room temperature by cyclic voltammetry and chronoamperometry showed that Pt50Sn40Mg10/C gives a greater current density in comparison to that of Pt50Sn30Mg20/C, Pt50Sn25Mg25/C, Pt50Sn50/C, and Pt50Mg50/C. The power density obtained using Pt50Sn40Mg10/C (39.2 mW cm−2) as an anode catalyst in membraneless ethanol fuel cell was higher than that using Pt50Sn30Mg20/C, Pt50sn25Mg25/C, Pt50Sn50/C, and Pt50Mg50/C at the room temperature. CO poisoning can be reduced as a result of enhanced cell performance by the addition of Mg on the anode electrocatalysts. In this study, the carbon-supported binary Pt–Sn, Pt–Mg, and ternary Pt–Sn–Mg anode catalysts were successfully tested in a single membraneless fuel cell using 1.0 M ethanol and 0.5 M H2SO4 as the fuel and 0.1 M sodium perborate in sea water as the oxidant.
Keywords: Membraneless fuel cell; Electrocatalysts; Cyclic voltammetry; Chronoamperometry.
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