Sustainable Synthesis of Metal-Doped Lignin-Derived Electrospun Carbon Fibers for the Development of ORR Electrocatalysts
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Título: | Sustainable Synthesis of Metal-Doped Lignin-Derived Electrospun Carbon Fibers for the Development of ORR Electrocatalysts |
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Autor/es: | Jaimes-Paez, Cristian Daniel | García-Mateos, Francisco J. | Ruiz-Rosas, Ramiro | Rodríguez-Mirasol, José | Cordero, Tomás | Morallon, Emilia | Cazorla-Amorós, Diego |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Electrospinning | Carbon fibers | Lignin | Self-standing electrodes | ORR |
Fecha de publicación: | 9-nov-2023 |
Editor: | MDPI |
Cita bibliográfica: | Jaimes-Paez CD, García-Mateos FJ, Ruiz-Rosas R, Rodríguez-Mirasol J, Cordero T, Morallón E, Cazorla-Amorós D. Sustainable Synthesis of Metal-Doped Lignin-Derived Electrospun Carbon Fibers for the Development of ORR Electrocatalysts. Nanomaterials. 2023; 13(22):2921. https://doi.org/10.3390/nano13222921 |
Resumen: | The aim of this work is to establish the Oxygen Reduction Reaction (ORR) activity of self-standing electrospun carbon fiber catalysts obtained from different metallic salt/lignin solutions. Through a single-step electrospinning technique, freestanding carbon fiber (CF) electrodes embedded with various metal nanoparticles (Co, Fe, Pt, and Pd), with 8–16 wt% loadings, were prepared using organosolv lignin as the initial material. These fibers were formed from a solution of lignin and ethanol, into which the metallic salt precursors were introduced, without additives or the use of toxic reagents. The resulting non-woven cloths were thermostabilized in air and then carbonized at 900 °C. The presence of metals led to varying degrees of porosity development during carbonization, improving the accessibility of the electrolyte to active sites. The obtained Pt and Pd metal-loaded carbon fibers showed high nanoparticle dispersion. The performance of the electrocatalyst for the oxygen reduction reaction was assessed in alkaline and acidic electrolytes and compared to establish which metals were the most suitable for producing carbon fibers with the highest electrocatalytic activity. In accordance with their superior dispersion and balanced pore size distribution, the carbon fibers loaded with 8 wt% palladium showed the best ORR activity, with onset potentials of 0.97 and 0.95 V in alkaline and acid media, respectively. In addition, this electrocatalyst exhibits good stability and selectivity for the four-electron energy pathway while using lower metal loadings compared to commercial catalysts. |
Patrocinador/es: | The authors would like to thank the PID2019-105923RB-I00 project funded by MCIN/AEI/10.13039/501100011033, the RTI2018-097555-B-I00 project funded by MICINN and EFRD, and the Generalitat Valenciana (GRISOLIA/2020/114) for the financial support. |
URI: | http://hdl.handle.net/10045/138604 |
ISSN: | 2079-4991 |
DOI: | 10.3390/nano13222921 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3390/nano13222921 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas INV - GEPE - Artículos de Revistas |
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