High catalytic activity of nanostructured Pd thin films electrochemically deposited on polycrystalline Pt and Au substrates towards electro-oxidation of methanol |
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| Institution: | 1. Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, Shandong University, Jinan 250100, China;2. Department of Chemistry, Shandong University, Jinan 250100, China;3. School of the Ocean, Harbin Institute of Technology at Weihai, Weihai 264209, China;1. Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, PA 15261, USA;2. Center for Biologic Imaging, University of Pittsburgh, Pittsburgh, PA 15261, USA;3. Magee-Womens Research Institute, 204 Craft Ave, B509, Pittsburgh, PA 15213, USA;4. Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA;5. McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA;1. Lviv Polytechnic National University, Bandery Street 12, 79013 Lviv, Ukraine;2. Ivan Franko National University of Lviv, Kyryla and Mefodia Street 6, 79005 Lviv, Ukraine;3. Karpenko Physical-Mechanical Institute of the NASU, Naukova Street 5, 79060 Lviv, Ukraine;1. Solidification Processes and Complex Structures, Institute for Complex Materials, IFW Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany;2. Materials Science, Dalarna University, SE-791 88 Falun, Sweden;3. Laboratory for Microstructures, Shanghai University, 200444 Shanghai, China;4. State Key Laboratory for Mechanical Behavior of Materials and School of Materials Science and Engineering, Xi’an Jiaotong University, 710049 Xi’an, China;1. Department of Physics and Engineering Physics, Morgan State University, Baltimore, MD 21251, USA;2. Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77024, USA;3. School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China;4. Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA;5. Laser Optics Research Center, US Air Force Academy, Colorado Springs, CO 80840, USA;6. Department of Chemical Engineering and Material Sciences, Michigan State University, East Lansing, MI 48824, USA;1. Thermoelectric and Nanotechnology Research Center, Faculty of Science and Technology, Rajamangala University of Technology Suvarnabhumi, HuntraPhranakhon Si Ayutthaya, 13000, Thailand;2. National Electronics and Computer Technology Center, National Science and Technology Development Agency, PathumThani 12120, Thailand;3. Department of Physics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand |
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| Abstract: | Nanostructured Pd thin films are directly formed on polycrystalline Pt and Au substrates in the absence of hard and soft templates by using a cyclic potential sweep technique, which is confirmed by both SEM observation and their unusual cyclic voltammetric characteristics in H2SO4 solution. Interestingly, the bimetallic electrodes obtained after the deposition of ultrathin Pd films onto Pt and Au substrates display much higher catalytic activity towards the electro-oxidation of methanol than the bulk Pt electrode. Besides, it is found that the foreign metal substrate has great influence on the electro-catalytic behavior of the Pd films. |
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