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oai:riuma.uma.es:10630/214012026-02-03T11:23:45Zcom_10630_2254col_10630_37953

Phase Transformation Dynamics in Sulfate-Loaded Lanthanide Triphosphonates. Proton Conductivity and Application as Fillers in PEMFCs Salcedo, Inés R. Pérez-Colodrero, Rosario Mercedes Bazaga-García, Montse López González, María del Mar Del Río, Carmen Xanthopoulos, Konstantinos Demadis, Konstantinos D. Hix, Gary B. Furasova, Aleksandra D. Choquesillo-Lazarte, Duane Olivera-Pastor, Pascual Cabeza-Díaz, Aurelio Química inorgánica Cristalografía Mineralogía Phase transformation dynamics and proton conduction properties are reported for cationic layer-featured coordination polymers derived from the combination of lanthanide ions (Ln3+) with nitrilo-tris(methylenephosphonic acid) (H6NMP) in the presence of sulfate ions. Two families of materials are isolated and structurally characterized, i.e., [Ln2(H4NMP)2(H2O)4](HSO4)2·nH2O (Ln = Pr, Nd, Sm, Eu, Gd, Tb, Er, Yb; n = 4−5, Series I) and [Ln(H5NMP)]SO4· 2H2O (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. 2021-04-20T08:18:16Z 2021-04-20T08:18:16Z 2021-04-20T08:18:16Z 2021 journal article ACS Appl. Mater. Interfaces 2021, 13, 15279−15291. https://pubs.acs.org/doi/abs/10.1021/acsami.1c01441 https://hdl.handle.net/10630/21401 10.1021/acsami.1c01441 eng open access ACS Publications. American Chemical Society