Role of Pd in the Electrochemical Hydrogenation of Nitrobenzene Using CuPd Electrodes
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Other documents of the author: Carvajal, David; Arcas, Ramón; Mesa, Camilo A.; Fabregat-Santiago, Francisco; Mas, Elena
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
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https://doi.org/10.1002/adsu.202100367 |
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Title
Role of Pd in the Electrochemical Hydrogenation of Nitrobenzene Using CuPd ElectrodesDate
2022-04Publisher
WileyISSN
2366-7486Type
info:eu-repo/semantics/articlePublisher version
https://onlinelibrary.wiley.com/doi/full/10.1002/adsu.202100367Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Interest in the electrochemical reduction of organic compounds as an alternative to hydrogen electrosynthesis is driven, among other reasons, by the fact that the products obtained in this process may have more economic ... [+]
Interest in the electrochemical reduction of organic compounds as an alternative to hydrogen electrosynthesis is driven, among other reasons, by the fact that the products obtained in this process may have more economic value than H2. Furthermore, the technique, coupled with renewable sources of electricity, may open the door for large volume green chemical synthesis. In the present article, the electrochemical reduction and hydrogenation of nitrobenzene to aniline at neutral pH is focused upon, using copper electrodes with and without palladium decoration. Both electrodes present good activity, with a decrease in the overpotential for nitrobenzene reduction and the competing hydrogen evolution reaction when Pd is deposited in the surface of the Cu electrode. It is observed that the rate and selectivity of nitrobenzene reduction to aniline improves at high concentrations, obtaining yields close to 70% for 30 × 10−3 m initial concentrations of nitrobenzene when using Pd decorated Cu electrodes. Impedance spectroscopy analysis reveals that the role of Pd in the decorated electrodes is to enhance the production of H* radicals, necessary for the nitrobenzene reduction process. This explains the increase in the selectivity toward aniline production by the incorporation of small amounts of Pd in the surface of the Cu electrode. [-]
Is part of
Advanced Sustainable Systems, 2022, vol. 6, no 4Funder Name
Ministerio de Ciencia, Innovación y Universidades | Universitat Jaume I | Generalitat Valenciana
Funder ID
http://dx.doi.org/10.13039/501100011033
Project code
MICIU/ICTI2017-2020/PID2020-116093RB-C41 | UJI-B2019-20 | PROMETEO/2020/028 | GRISOLIAP/2019/057 | POSDOC/2019/20
Project title or grant
Desarrollo de sistemas electrocatalíticos integrados para la síntesis de productos químicos de alto valor añadido
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Copyright © John Wiley & Sons, Inc.
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http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
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