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http://cicy.repositorioinstitucional.mx/jspui/handle/1003/3347| Enhancing the Catalytic Activity of Pd Nanocatalysts for Anion Exchange Membrane Direct Ethanol Fuel Cells by Functionalizing Vulcan XC-72 with Cu Organometallic Compounds | |
| Perla Cecilia Meléndez González MANUEL OCTAVIO FUENTEZ TORRES María Esther Sánchez Castro Ivonne Liliana Alonso Lemus Beatriz Escobar Morales W.J. Pech-Rodríguez Teko Wilhelmin Napporn Javier Rodríguez-Varela | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| 10.1021/acsanm.4c02670 | |
| SURFACE FUNCTIONALIZATION CU ORGANOMETALLIC COMPOUNDS PD NANOCATALYSTS ETHANOL OXIDATION REACTION ANION EXCHANGE MEMBRANE DIRECT ETHANOL FUEL CELLS | |
| The most widely used support in low-temperature fuel cell applications is the commercially available Vulcan XC-72. Herein, we report its functionalization with the home-obtained mesityl copper (Cu-mes) and Cu coordinate (Cu(dmpz)L2) organometallic compounds. Pd nanoparticles are anchored on the supports obtaining Pd/CCu-mes, Pd/CCu(dmpz)L2, and Pd/C (on nonfunctionalized support). The polarization curves of the ethanol oxidation reaction (EOR) show that Pd/CCu-mes and Pd/CCu(dmpz)L2 promote the reaction at a more negative onset potential, i.e., Eonset = 0.38 V/reversible hydrogen electrode (RHE), compared to 0.41 V/RHE of Pd/C. The mass current density (jm) delivered by Pd/CCu-mes is considerably higher (1231.3 mA mgPd-1), followed by Pd/CCu(dmpz)L2 (1001.8 mA mgPd-1), and Pd/C (808.3 mA mgPd-1). The enhanced performance of Pd/CCu-mes and Pd/CCu(dmpz)L2 for the EOR (and tolerance to CO poisoning) is attributed to a shift of their d-band center toward more negative values, compared to Pd/C, because of the formation of PdCu alloyed phases arising from the functionalization. In addition, laboratory-scale tests of the anion exchange membrane-direct ethanol fuel cell assembled with Pd/CCu-mes show the highest open circuit voltage (OCV = 0.60 V) and cell power density (Pcell = 0.14 mW cm-2). As a result of its high catalytic activity, Pd/CCu-mes can find application as an anode nanocatalyst in AEM-DEFCs. © 2024 The Authors. Published by American Chemical Society. | |
| 2024 | |
| Artículo | |
| ACS Applied Nano Materials, 7(17), 20071-20084, 2024. | |
| Inglés | |
| ENERGÍA | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos de Investigación Arbitrados |
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