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dc.contributor.authorBazaga García, Montse
dc.contributor.authorVílchez-Cózar, Álvaro
dc.contributor.authorMaranescu, Bianca
dc.contributor.authorOlivera-Pastor, Pascual 
dc.contributor.authorMarganovici, Marko
dc.contributor.authorIlia, Gheorghe
dc.contributor.authorCabeza-Diaz, Aurelio 
dc.contributor.authorVisa, Aurelia
dc.contributor.authorColodrero, Rosario M. P.
dc.date.accessioned2021-04-09T06:51:59Z
dc.date.available2021-04-09T06:51:59Z
dc.date.created2021
dc.date.issued2021
dc.identifier.citationDalton Trans., 2021, Accepted Manuscript; https://doi.org/10.1039/D1DT00104Ces_ES
dc.identifier.urihttps://hdl.handle.net/10630/21302
dc.descriptionhttps://doi.org/10.1039/D1DT00104Ces_ES
dc.description.abstractWe report herein the synthesis, structural characterization and electrocatalytic properties of three new coordination polymers, resulting from the combination of divalent metal (Ca2+, Cd2+ or Co2+) salts with (2-carboxyethyl)(phenyl)phosphinic acid. In addition to the usual hydrothermal procedure, the Co2+ derivative could be also prepared by microwave-assisted synthesis, in much shorter times. The crystal structures were solved ab initio, from powder diffraction data. Compounds MII[O2P(CH2CH2COOH)(C6H5)]2 {M= Cd (1) or Ca (2)} crystallize in the monoclinic system and display a layered topology, with the phenyl groups pointing toward the interlayer space in a interdigitated fashion. Compound Co2[(O2P(CH2CH2COO)(C6H5)(H2O)]2·2H2O (3) presents a 1D structure composed of zig-zag chains, formed by edge-sharing cobalt octahedra, with phenyl groups pointing outside. Packing of these chains is favored by hydrogen bond interactions via lattice water. In addition, H-bonds along the chains are established with participation of the water molecules and the hydrophilic groups from the ligand. However, the solid exhibits a low proton conductivity, attributed to the isolation of the hydrophilic regions caused by the arrangement of hydrophobic phenyl groups. Preliminary studies on the electrocatalytical performance for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) have been conducted for compound 3 and its pyrolytic derivatives, which were previously throughout characterized. By comparison, another Co2+ phosphinate, 4, obtained by microwave-assisted synthesis, but with distinct stoichiometry and known structure was also tested. For OER, the best performance was reached with a derivative of 3, prepared by heating this compound in N2 at 200 °C. This derivative presented overpotential (339 mV, for a current density of 10 mA·cm-2) and Tafel slope (51.7 mV·dec-1) values comparable to other Co2+ related materials.es_ES
dc.description.sponsorshipProyecto nacional del MICINN MAT2016-77648-R; PID2019-110249RB-I00 y FQM-113 proyectos de la Junta de Andalucía. Plan Propio de la UMA y ALBA Sincrotrón por la utilización de la línea BM04 beam-line en el experimento (proposal nº 2016091873)es_ES
dc.language.isospaes_ES
dc.publisherRoyal Society of Chemistryes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectElectroquímicaes_ES
dc.subjectProtoneses_ES
dc.subject.otherElectrochemical propertieses_ES
dc.subject.otherproton conductivityes_ES
dc.subject.othermetal(II)-carboxyethylphenylphosphinateses_ES
dc.titleSynthesis and Electrochemical properties of metal(II)- carboxyethylphenylphosphinateses_ES
dc.typeinfo:eu-repo/semantics/preprintes_ES
dc.centroFacultad de Cienciases_ES
dc.identifier.doi10.1039/D1DT00104C


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