RT Journal Article
T1 Synthesis and Electrochemical properties of metal(II)- carboxyethylphenylphosphinates
A1 Bazaga-García, Montse
A1 Vílchez-Cózar, Álvaro
A1 Maranescu, Bianca
A1 Olivera-Pastor, Pascual
A1 Marganovici, Marko
A1 Ilia, Gheorghe
A1 Cabeza-Díaz, Aurelio
A1 Visa, Aurelia
A1 Pérez-Colodrero, Rosario Mercedes
K1 Electroquímica
K1 Protones
AB We report herein the synthesis, structural characterization and electrocatalytic properties of three new coordinationpolymers, resulting from the combination of divalent metal (Ca2+, Cd2+ or Co2+) salts with (2-carboxyethyl)(phenyl)phosphinicacid. In addition to the usual hydrothermal procedure, the Co2+ derivative could be also prepared by microwave-assistedsynthesis, in much shorter times. The crystal structures were solved ab initio, from powder diffraction data. CompoundsMII[O2P(CH2CH2COOH)(C6H5)]2 {M= Cd (1) or Ca (2)} crystallize in the monoclinic system and display a layered topology, withthe phenyl groups pointing toward the interlayer space in a interdigitated fashion. CompoundCo2[(O2P(CH2CH2COO)(C6H5)(H2O)]2·2H2O (3) presents a 1D structure composed of zig-zag chains, formed by edge-sharingcobalt octahedra, with phenyl groups pointing outside. Packing of these chains is favored by hydrogen bond interactions vialattice water. In addition, H-bonds along the chains are established with participation of the water molecules and thehydrophilic groups from the ligand. However, the solid exhibits a low proton conductivity, attributed to the isolation of thehydrophilic regions caused by the arrangement of hydrophobic phenyl groups. Preliminary studies on the electrocatalyticalperformance for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) have been conducted forcompound 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 alsotested. 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.
PB Royal Society of Chemistry
YR 2021
FD 2021
LK https://hdl.handle.net/10630/21302
UL https://hdl.handle.net/10630/21302
LA spa
NO Dalton Trans., 2021, Accepted Manuscript; https://doi.org/10.1039/D1DT00104C
NO https://doi.org/10.1039/D1DT00104C
NO Proyecto 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)
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026