Lignin-derived Pt supported carbon (submicron)fiber electrocatalysts for alcohol electro-oxidation

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Title: Lignin-derived Pt supported carbon (submicron)fiber electrocatalysts for alcohol electro-oxidation
Authors: García-Mateos, Francisco J. | Cordero-Lanzac, Tomás | Berenguer Betrián, Raúl | Morallon, Emilia | Cazorla-Amorós, Diego | Rodríguez-Mirasol, José | Cordero, Tomás
Research Group/s: Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Binderless carbon electrode | Electrospun lignin fiber | Platinum | Phosphoric acid | Alcohol electro-oxidation
Knowledge Area: Química Física | Química Inorgánica
Issue Date: 15-Aug-2017
Publisher: Elsevier
Citation: Applied Catalysis B: Environmental. 2017, 211: 18-30. doi:10.1016/j.apcatb.2017.04.008
Abstract: Lignin fibers, with and without phosphorus, and loaded with platinum have been prepared in a single step by electrospinning of lignin/ethanol/phosphoric acid/platinum acetylacetonate precursor solutions. Thermochemical treatments have been carried out to obtain lignin-based carbon fiber electrocatalysts. The electrospun lignin fibers were thermostabilized in air and carbonized at 900 °C. The effect of phosphorus and platinum content on the porous texture, the surface chemistry and the oxidation/electro-oxidation resistance have been studied. Phosphorus-containing carbon fibers develop a higher surface area (c.a. 1200 m2 g−1), exhibit a lower Pt particle size (2.1 nm) and a better particle distribution than their counterpart without phosphorus (c.a. 750 m2 g−1 of surface area and 9.6 nm Pt particle size). It has been proved that phosphorus improves the oxidation and electro-oxidation resistance of the fibers, avoiding their oxidation during the preparation thermal stages and is responsible of the generation of a microporous material with an unusual wide operational potential window (1.9 V). An important Pt–P synergy has been observed in the oxygen transfer during the oxidation and electro-oxidation of the fibers. The obtained carbon fibers can act directly as electrodes without any binder or conductivity promoter. The fibers with platinum have shown outstanding catalyst performance in the electro-oxidation of methanol and ethanol.
Sponsor: This work was supported by the Spanish MINECO under CTQ2015-68654-R project.
ISSN: 0926-3373 (Print) | 1873-3883 (Online)
DOI: 10.1016/j.apcatb.2017.04.008
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 Elsevier B.V.
Peer Review: si
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