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Electrocatalytic Activity of Platinum-palladium Catalysts Prepared by Sequential Reduction Methods  

Park, Jae Young (Department of Chemical and Biochemical Engineering, Pusan National University)
Park, Soo-Jin (Department of Chemistry, Inha University)
Jung, Yongju (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Kim, Seok (Department of Chemical and Biochemical Engineering, Pusan National University)
Publication Information
Applied Chemistry for Engineering / v.23, no.2, 2012 , pp. 153-156 More about this Journal
Abstract
In this study, two different methods were studied to prepare Pt-Pd catalysts for direct methanol fuel cells in order to enhance the electrochemical efficiency. The catalysts were compared with simultaneously deposited Pt-Pd and sequentially deposited Pt-Pd. The electrocatalysts contained 20 wt% of metal loading on carbon black and 1 : 2 of Pt : Pd atomic ratio. Electrochemical properties of the catalysts were compared by measuring cyclic voltammetries and average sizes and lattice parameters were measured by transmission electron microscopy images and x-ray diffraction. As a result, sequentially deposited Pt-Pd/C catalysts showed better electrochemical properties than those of simultaneously deposited Pt-Pd/C catalysts.
Keywords
electrocatalytic activity; reduction; nanoparticle; direct methanol fuel cell; Pt-Pd catalysts;
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