Performance of silver nanocubes based on electrochemical surface area for catalyzing oxygen reduction reaction |
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| Institution: | 1. Department of Chemistry Ångström Laboratory, Uppsala University, Box 523, SE 75120 Uppsala, Sweden;2. Department of Physics, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya;3. Department of Engineering Sciences, Nanotechnology and Functional Materials, Uppsala University, Box 534, SE 75120 Uppsala, Sweden;4. Labratoary of photomolecular science, École Polytechnique Fédérale de Lausanne, SB-ISIC-LSPM, Chemin des Alambics, Station 6, CH G1 523, CH-1015 Lausanne, Switzerland;1. Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 30-059 Kraków, 25, Reymonta Street, Poland;2. CEMUC, Physics Engineering Department, Faculdade de Engenharia da Universidade do Porto, R. Dr. Roberto Frias s/n, 4200-465 Porto, Portugal;1. Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Rd., Hong Kong;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, P. R. China;3. Department of Chemical Engineering, National Tsing-Hua University, Hsinchu 300, Taiwan;1. College of Materials Science and Engineering, Anhui University of Science & Technology, Huainan, 232001, PR China;2. Department of Advanced Materials Science & Engineering, Hanseo University, Seosan-si, Chungcheongnam-do, 31962, South Korea;3. Korea Institute of Ceramic Engineering and Technology, Soho-ro, Jinju-Si, Gyeongsangnam-do, South Korea;4. Decontamination & Decommisioning Research Division, Korea Atomic Energy Research Institute, P.O. Box 105, Yuseong-gu,Daejeon, 305-600, South Korea |
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| Abstract: | Ag nanocubes that are 45 nm in size are synthesized and successfully used as catalysts in oxygen electroreduction. Electrochemical surface areas (ESAs) are considered to determine the effect on HO2? production, which is found to be in the following order: nanocubes < nanoparticles. Comparative data generated using Tafel analyses in 0.1 M NaOH electrolyte without and with methanol show that unchanged slopes on the prepared cubic catalysts can indicate high resistance of Ag nanocubes for methanol oxidation during oxygen reduction reaction. Among these Ag catalysts, nanocubes exhibit 9.29 × 10? 2 mA cm? 2 (at ? 0.15 V vs. Ag/AgCl), the better activity in the oxygen reduction reaction. |
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