Exploring the synergistic effect of palladium nanoparticles and highly dispersed transition metals on carbon nitride/super-activated carbon composites for boosting electrocatalytic activity
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Título: | Exploring the synergistic effect of palladium nanoparticles and highly dispersed transition metals on carbon nitride/super-activated carbon composites for boosting electrocatalytic activity |
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Autor/es: | Alemany Molina, Gabriel | Navlani-García, Miriam | Juan Juan, Jerónimo | Morallon, Emilia | Cazorla-Amorós, Diego |
Grupo/s de investigación o GITE: | Materiales Carbonosos y Medio Ambiente | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Carbon nitride | Copper | Iron | Palladium | HER | ORR | OER |
Fecha de publicación: | 11-ene-2024 |
Editor: | Elsevier |
Cita bibliográfica: | Journal of Colloid and Interface Science. 2024, 660: 401-411. https://doi.org/10.1016/j.jcis.2024.01.057 |
Resumen: | In the present work, multifunctional electrocatalysts formed by palladium nanoparticles (Pd NPs) loaded on Fe or Cu-containing composite supports, based on carbon nitride (C3N4) and super-activated carbon with a high porosity development (SBET 3180 m2/g, VDR 1.57 cm3/g, and VT 1.65 cm3/g), were synthesised. The presence of Fe or Cu sites favoured the formation of Pd NPs with small average particle size and a very narrow size distribution, which agreed with Density Functional Theory (DFT) calculations showing that the interaction of Pd clusters with C3N4 flakes is weaker than with Cu- or Fe-C3N4 sites. The electroactivity was also dependent on the composition and, as suggested by preliminary DFT calculations, the Pd-Cu catalyst showed lower overpotential for hydrogen evolution reaction (HER) while bifunctional oxygen reduction reaction/ oxygen evolution reaction (ORR/OER) behaviour was superior in Pd-Fe sample. The Pd-Fe electrocatalyst was studied in a zinc-air battery (ZAB) for 10 h, showing a performance similar to a commercial Pt/C + RuO2 catalyst with a high content of precious metal. This study demonstrates the synergistic effect between Pd species and transition metals and shows that transition metals anchored on C3N4-based composite materials promote the electroactivity of Pd NPs in HER, ORR and OER due to the interaction between both species. |
Patrocinador/es: | The authors would like to thank PID2021-123079OB-I00 project funded by MCIN/AEI/10.13039/501100011033 and “ERDF A way of making Europe”. G. Alemany-Molina thanks Ministerio de Universidades for the FPU20/03969 grant. M. Navlani-García acknowledges the Ramón y Cajal contract (RYC2021-034199-I) funded by MCIN/AEI/10.13039/501100011033 and the European Union «NextGenerationEU»/PRTR». |
URI: | http://hdl.handle.net/10045/139699 |
ISSN: | 0021-9797 (Print) | 1095-7103 (Online) |
DOI: | 10.1016/j.jcis.2024.01.057 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2024 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.jcis.2024.01.057 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas INV - GEPE - Artículos de Revistas |
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Archivo | Descripción | Tamaño | Formato | |
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Alemany-Molina_etal_2024_JColloidInterfaceSci.pdf | 9,73 MB | Adobe PDF | Abrir Vista previa | |
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