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Phase Transformation Dynamics in Sulfate-Loaded Lanthanide Triphosphonates. Proton Conductivity and Application as Fillers in PEMFCs.
Salcedo, Inés R. Colodrero, Rosario MP Bazaga-García, Montse López-González, M Del Río, Carmen Xanthopoulos, Konstantinos Demadis, Konstantinos D. Hix, Gary B. Furasova, Aleksandra D Choquesillo-Lazarte, Duane
Salcedo, Inés R.
Colodrero, Rosario MP
Bazaga-García, Montse
López-González, M
Del Río, Carmen
Xanthopoulos, Konstantinos
Demadis, Konstantinos D.
Hix, Gary B.
Furasova, Aleksandra D
Choquesillo-Lazarte, Duane
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2021-03-25
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Abstract
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.
Citation
Salcedo, I. R., Colodrero, R. M. P., Bazaga-García, M. et al. (2021) Phase Transformation Dynamics in Sulfate-Loaded Lanthanide Triphosphonates. Proton Conductivity and Application as Fillers in PEMFCs., ACS Applied Materials and Interfaces, 13 (13), pp. 15279–15291
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PubMed ID
33764728 (pubmed)
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Journal article
Language
en
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This is an accepted manuscript of an article published by American Chemical Society in ACS Applied Materials and Interface on 25/03/2021, available online: https://pubs.acs.org/doi/10.1021/acsami.1c01441
The accepted version of the publication may differ from the final published version.
Series/Report no.
ISSN
1944-8244
EISSN
1944-8252