An alternative to hydrogenation processes. Electrocatalytic hydrogenation of benzophenone

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Title: An alternative to hydrogenation processes. Electrocatalytic hydrogenation of benzophenone
Authors: Mozo Mulero, Cristina | Sáez, Alfonso | Iniesta, Jesus | Montiel, Vicente
Research Group/s: Electroquímica Aplicada y Electrocatálisis
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Benzophenone | Diphenylmethanol | Electrocatalytic hydrogenation | Palladium nanoparticles | Polymer electrolyte membrane
Knowledge Area: Química Física
Issue Date: 1-Mar-2018
Publisher: Beilstein-Institut
Citation: Beilstein Journal of Organic Chemistry. 2018, 14: 537-546. doi:10.3762/bjoc.14.40
Abstract: The electrocatalytic hydrogenation of benzophenone was performed at room temperature and atmospheric pressure using a polymer electrolyte membrane electrochemical reactor (PEMER). Palladium (Pd) nanoparticles were synthesised and supported on a carbonaceous matrix (Pd/C) with a 28 wt % of Pd with respect to carbon material. Pd/C was characterised by transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). Cathodes were prepared using Pd electrocatalytic loadings (LPd) of 0.2 and 0.02 mg cm−2. The anode consisted of hydrogen gas diffusion for the electrooxidation of hydrogen gas, and a 117 Nafion exchange membrane acted as a cationic polymer electrolyte membrane. Benzophenone solution was electrochemically hydrogenated in EtOH/water (90/10 v/v) plus 0.1 M H2SO4. Current densities of 10, 15 and 20 mA cm−2 were analysed for the preparative electrochemical hydrogenation of benzophenone and such results led to the highest fractional conversion (XR) of around 30% and a selectivity over 90% for the synthesis of diphenylmethanol upon the lowest current density. With regards to an increase by ten times the Pd electrocatalytic loading the electrocatalytic hydrogenation led neither to an increase in fractional conversion nor to a change in selectivity.
Sponsor: Authors thank the Ministerio de Economia y Competitividad MINECO, Spain for its financial support by the research projects CTQ2013-48280-C3-3-R and CTQ2016-76231-C2-2-R.
ISSN: 1860-5397
DOI: 10.3762/bjoc.14.40
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Mozo Mulero et al.; licensee Beilstein-Institut. This is an Open Access article under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Peer Review: si
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