2026-05-30T03:46:25Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/77272026-02-03T12:12:50Zcom_10630_2254col_10630_37959
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Cabeza-Díaz, Aurelio
author
Pérez-Colodrero, Rosario Mercedes
author
Bazaga-García, Montse
author
Hernández Alonso, Daniel
author
Compaña Prieto, José Manuel
author
Olivera-Pastor, Pascual
author
Losilla, Enrique R.
author
García-Aranda, Miguel Ángel
author
León-Reina, Laura
2014-06-25T12:02:53Z
2014-06-25T12:02:53Z
2014-06-25
http://hdl.handle.net/10630/7727
The necessity of energy and power generation is constantly growing. Fossils fuels are quickly becoming unsatisfactory substrates due to both their emission of pollutants and their finite expectancy. Fuel cells are one of the best alternatives as they are clean, durable, and highly efficient 1. MOFs will be attractive candidates for this application because of their tuneable pore size functionality as well as their chemical and thermal stability and presence of acidic protons within their structure2.
In the present work, we report the syntheses, crystal structural and proton conductivities of various metal phosphonate derivatives, using both rigid (5-(dihydroxyphosphoryl)isophthalic acid, PiPhtA and 2-hydroxyphosphonoacetic acid, HPAA) and flexible (hexa- or octamethylenediamine-N,N,N′,N′-tetrakis-(methylenephosphonic acid, H8HDTMP or H8ODTMP) multifunctional ligands. These materials show 3D open-frameworks containing 1D channels decorated with phosphonic and carboxylic acid groups and filled with hydrogen bonded water molecules what make them good candidates as proton conductors. For instance, Ca-PiPhtA, containing a rigid ligand, exhibits a proton conductivity of 5.7•10-4 S/cm which increases to 6.6•10-3 S/cm when the sample is exposed to ammonia vapors3. Other magnesium or lanthanides metal phosphonates, built with flexible ligands, show conductivities values range between 1.6 10-3 S/cm (for MgODTMP4) and 8.6 10-3 S/cm (for LaHDTMP5) at T=292K at ~100% relative humidity, and activation energies values typically attributed to a Grotthuss mechanism.
eng
Conductividad eléctrica
Proton Conductors based on Metal Phosphonate Hybrid Materials for PEM Fuel Cells
conference output
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URL
https://riuma.uma.es/bitstreams/0fbece31-1365-4a34-993e-bbdf6149e437/download
File
MD5
ed2b62b7b95df4d2009fe44c2501e6a3
42574
application/pdf
Abstract workshop AJL_ACD.pdf
URL
https://riuma.uma.es/bitstreams/fd39fb07-6238-42ec-a197-9e705bf2dd51/download
File
MD5
3c21a14aecc2c40b6387b906f6f0902a
3289
text/plain
Abstract workshop AJL_ACD.pdf.txt