| Autor: |
Salcedo IR; Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, Campus de Teatinos s/n, Málaga-29071, Spain., Colodrero RMP; Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, Campus de Teatinos s/n, Málaga-29071, Spain., Bazaga-García M; Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, Campus de Teatinos s/n, Málaga-29071, Spain., López-González M; Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, Madrid-28006, Spain., Del Río C; Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, Madrid-28006, Spain., Xanthopoulos K; Crystal Engineering, Growth and Design Laboratory, Department of Chemistry, University of Crete, Heraklion, Crete, GR-71003, Greece., Demadis KD; Crystal Engineering, Growth and Design Laboratory, Department of Chemistry, University of Crete, Heraklion, Crete, GR-71003, Greece., Hix GB; School of Sciences, University of Wolverhampton, Wulfruna Street, Wolverhampton WV1 1LY, United Kingdom., Furasova AD; Department of Physics and Engineering, ITMO University, St. Petersburg 197101, Russia., Choquesillo-Lazarte D; Laboratorio de Estudios Cristalográficos, IACT (CSIC-UGR), Avda. de las Palmeras 4, 18100 Armilla, Granada , Spain., Olivera-Pastor P; Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, Campus de Teatinos s/n, Málaga-29071, Spain., Cabeza A; Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, Campus de Teatinos s/n, Málaga-29071, Spain. |
| Abstrakt: |
Phase transformation dynamics and proton conduction properties are reported for cationic layer-featured coordination polymers derived from the combination of lanthanide ions (Ln 3+ ) with nitrilo-tris(methylenephosphonic acid) (H 6 NMP) in the presence of sulfate ions. Two families of materials are isolated and structurally characterized, i.e., [Ln 2 (H 4 NMP) 2 (H 2 O) 4 ](HSO 4 ) 2 · n H 2 O (Ln = Pr, Nd, Sm, Eu, Gd, Tb, Er, Yb; n = 4-5, Series I ) and [Ln(H 5 NMP)]SO 4 ·2H 2 O (Ln = Pr, Nd, Eu, Gd, Tb; Series II ). Eu/Tb bimetallic solid solutions are also prepared for photoluminescence studies. Members of families I and II display high proton conductivity (10 -3 and 10 -2 S·cm -1 at 80 °C and 95% relative humidity) and are studied as fillers for Nafion-based composite membranes in PEMFCs, under operating conditions. Composite membranes exhibit higher power and current densities than the pristine Nafion membrane working in the range of 70-90 °C and 100% relative humidity and with similar proton conductivity. |
