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Multiphase PtPdSb nanoparticles for direct electrochemical energy conversion using hydrogen-rich dimethyl ether
| Citace: |
GEBRU, MG.; PITUSSI, I.; TELLER, H.; MARAMMURIAN CHATHOTH, A.; KORNWEITZ, H.; MEDLÍN, R.; BĚLSKÝ, P.; SUBRAMANIAN, P.; SCHECHTER, A. Multiphase PtPdSb nanoparticles for direct electrochemical energy conversion using hydrogen-rich dimethyl ether. JOURNAL OF POWER SOURCES, 2025, roč. 632, č. MAR 15 2025, s. nestránkováno. ISSN 0378-7753.
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| Druh: | ČLÁNEK |
| Jazyk publikace: | eng |
| Anglický název: | Multiphase PtPdSb nanoparticles for direct electrochemical energy conversion using hydrogen-rich dimethyl ether |
| Rok vydání: | 2025 |
| Autoři: | Medhanie Gebremedhin Gebru , Itay Pitussi , Hanan Teller , Achyuth Marammurian Chathoth , Haya Kornweitz , Ing. Rostislav Medlín Ph.D. , Mgr. Petr Bělský Ph.D. , Master of Science Palaniappan Subramanian Doctor of Philosophy in Chemistry , Alexander Schechter Doctor of Philosophy |
| Abstrakt EN: | Dimethyl ether (DME) is a promising next-generation renewable fuel for polymer electrolyte membrane fuel cells (PEMFC) because of its high energy density, ease of handling and supply, nontoxicity, reduced crossover, and ability to be obtained from a wide range of renewable sources. However, its commercialization has not yet been realized, owing to the low activity of state-of-the-art catalysts. We have synthesized a novel Genkenite ternary metal catalyst, PtxPdySbz/C, with varying metal compositions and tested its activity towards DME oxidation in both three-electrode flooded cell and in single fuel cell configurations. Some important insights into the DME reaction mechanism were gleaned using ex-situ Fourier transform infrared spectroscopy and were supported by density functional theory (DFT) computations. A direct DME fuel cell constructed with 1.2 and 3.1 mgPGM cm? 2 loading of Pt5PdSb4/C and Pt/C as anode and cathode catalysts, respectively, operating at 65 ?C temperature and no back pressure delivered a peak power density of 180 mW cm? 2 and one of the highest reported current density of 360 mA cm? 2 at 0.5 V. Moreover, the catalyst provided the highest PGM (Pt+Pd) mass normalized power density of 150 mW mg?PG1M. |
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