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Title: Synthesis of Pd-Ag/C electro-catalysts and their activities for ethanol oxidation in alkaline media
Authors: Law, Hiu Mung.
Keywords: DRNTU::Engineering::Chemical engineering::Biotechnological production
Issue Date: 2009
Abstract: Bimetallic Palladium-Silver electro-catalysts supported on carbon black (Pd-Ag/C) were synthesized and tested for its performance for ethanol oxidation in alkaline media. The synthesis method using NaBH4 reduction method allows formation of Palladium (Pd) and Silver (Ag) nano-particles. X-Ray Diffraction (XRD) and Transmission Electron Spectroscopy (TEM) were performed to determine the surface and morphology of the electro-catalysts. Electrochemical tests, namely carbon monoxide (CO) stripping, cyclic voltammetry (CV), chronoamperometry, electrochemical impedance spectroscopy (EIS), effect of different temperature on CV are conducted. Through these electrochemical tests, the electro-catalytic activities of Pd-Ag/C are found to be superior to that of pure Pd and pure Platinum (Pt) electro-catalysts. Different compositions of Pd-Ag/C were compared to optimize ratio of Pd is to Ag to give the highest electro-catalytic activity. Maintaining potassium hydroxide (KOH) concentration, effect of changing ethanol (C2H5OH) concentration in C2H5OH-KOH solution on the optimized composition of Pd-Ag/C is investigated using CV technique. Similarly, the optimum Pd-Ag/C is subjected to CV by changing KOH concentrations while maintaining C2H5OH concentration and its effect is investigated. This project researches on the potential of Pd-Ag/C electro-catalysts to be used for ethanol oxidation in alkaline media.
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Student Reports (FYP/IA/PA/PI)

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