Platinum dendrites with controlled sizes for oxygen reduction reaction |
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| Authors: | Cheonghee Kim Jong-Gil Oh Yong-Tae Kim Hansung Kim Hyunjoo Lee |
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| Institution: | 1. Department of Chemical and Biomolecular Engineering, The Specialized Graduate School of Hydrogen & Fuel Cell, Yonsei University, Seoul 120-749, South Korea;2. School of Mechanical Engineering, Pusan National University, Busan 609-735, South Korea |
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| Abstract: | Platinum dendrites were synthesized with the controlled sizes of 13–53 nm, and their electrocatalytic properties were evaluated for oxygen reduction reaction (ORR). Dendrites showed a superior activity for ORR and better selectivity for the production of H2O, compared to commercial E-tek catalysts. Durability was also tested by estimating the change in electrochemically active surface area (ECSA) after extended periods of oxygen reduction. Dendrites with larger sizes showed improved durability. |
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