Fabrication, characterization and electrochemical response of pitch-derived open-pore carbon foams as electrodes

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Title: Fabrication, characterization and electrochemical response of pitch-derived open-pore carbon foams as electrodes
Authors: Hernández Ibáñez, Naiara | Montiel, Vicente | Molina Jordá, José Miguel | Iniesta, Jesus
Research Group/s: Electroquímica Aplicada y Electrocatálisis | Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Carbon foam | Mesophase pitch | Replication method | Macroporous electrode
Knowledge Area: Química Física
Issue Date: Mar-2018
Publisher: Springer Science+Business Media B.V.
Citation: Journal of Applied Electrochemistry. 2018, 48(3): 329-342. doi:10.1007/s10800-018-1161-y
Abstract: Macroporous carbon foams (Cfoams) were synthesized by the replication process from mesophase pitch precursor and then characterized for electrochemical sensing and electrosynthetic applications. Scanning electron and optical microscopies revealed a uniform macropore size distribution, replicating the characteristics of the leachable NaCl particles used as templating agent. Nitrogen adsorption/desorption isotherms revealed the absence of meso- or microporosity, and the specific surface area was measured to be 0.38 m2 g−1. Mercury intrusion porosimetry offered similar results for the specific surface area, and the pore size distribution was deduced to be in the interval of 80 nm–200 µm. X-ray photoelectron spectroscopy allowed concluding that the pore surface exhibited poor oxygenated functionalization. Cyclic voltammetry depicted a wide potential window for the oxidation and reduction of water, with small pseudo-capacitive process. The electrochemical behaviour of outer-sphere reversible redox couples provided a standard rate constant k° of ca. 0.7 cm s−1, which is slightly superior to that shown using a conventional glassy carbon electrode. Biomolecules such as ascorbic acid, uric acid and dopamine were also examined to shed some light on sensing applications. The viability of regenerating the coenzyme nicotinamide adenine dinucleotide using a rhodium redox complex has also been addressed in order to explore electrosynthetic potentialities.
Sponsor: N.H. V.M and J.I. thank the Ministerio de Economia y Competitividad MINECO, Spain for its financial support under the research project grants, #CTQ2013-48280-C3-3-R and #CTQ2016-76231-C2-2-R. J.M. Molina acknowledges the financial support from the Ministerio de Economía y Competitividad MINECO, Spain, under project grant #MAT2016-77742-C2-2-P.
URI: http://hdl.handle.net/10045/74031
ISSN: 0021-891X (Print) | 1572-8838 (Online)
DOI: 10.1007/s10800-018-1161-y
Language: eng
Type: info:eu-repo/semantics/article
Rights: © Springer Science+Business Media B.V., part of Springer Nature 2018
Peer Review: si
Publisher version: http://dx.doi.org/10.1007/s10800-018-1161-y
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