High performance mesoporous Pt electrode for methanol electrooxidation. A DEMS study |
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| Institution: | 1. Quantum Beam Science Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan;2. Department of Biological Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan;3. Graduate School of Science, University of Hyogo, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan;4. Neutron Science Section, J-PARC Center, Tokai, Ibaraki 319-1195, Japan;1. Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice, Nam. Cs. Legii 565, 53002 Pardubice, Czech Republic;2. Department of Materials Science, Institute for Surface Science and Corrosion WW4-LKO, Friedrich-Alexander University, Martensstraße 7, D-91058 Erlangen, Germany;3. Chemistry Department, Faculty of Sciences, King Abdulaziz University, 80203 Jeddah, Saudi Arabia;4. Central European Institute of Technology, Brno University of Technology, Purkynova 123, 61200 Brno, Czech Republic;1. Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari Venezia, Calle Larga S. Marta 2137, 30123 Venezia, Italy;2. SCSOP, Via Bornò 5, 23896 Sirtori, Italy |
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| Abstract: | Electrodeposited mesoporous (MP) Pt electrodes were evaluated as catalysts for CO and methanol electrooxidation. Electrochemical analysis reveals a mass activity of 41 Ag?1 at 0.55 V in 1 M CH3OH, similar to carbon supported catalysts. However, the high current densities are related to low CO2 conversion efficiencies, as was established by using differential electrochemical mass spectrometry in a thin layer flow cell configuration (TLFC-DEMS). These results can be understood taking into account the especially accessible porous structure of the MP Pt, where the possibility of readsorption of partially oxidized products is low. |
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