RT Journal Article
T1 Proton conductive Zr-Phosphonate UPG-1-Aminoacid insertion as proton carrier stabilizer
A1 Vilela, Sergio M.F.
A1 Salcedo Abraira, Pablo
A1 Gómez Peña, Alejandro
A1 Trens, Philippe
A1 Varez, Alejandro
A1 Salles, Fabrice
A1 Horcajada, Patricia
AB Proton exchange membrane fuel cells (PEMFCs) are an attractive green technology for energy generation. The poor stability and performances under working conditions of the current electrolytes are their major drawbacks. Metal-Organic Frameworks (MOFs) have recently emerged as an alternative to overcome these issues. Here, we propose a robust Zr-phosphonate MOF (UPG-1) bearing labile protons able to acta priorias an efficient electrolyte in PEMFCs. Further, in an attempt to further enhance the stability and conductivity of UPG-1, a proton carrier (the amino acid Lysine, Lys) was successfully encapsulated within its porosity. The behaviors of both solids as an electrolyte were investigated by a complete experimental (impedance spectroscopy, water sorption) and computational approach (MonteCarlo, water sorption). Compared with the pristine UPG-1, the newly prepared Lys@UPG-1 composite showed similar proton conductivity but a higher stability, which allows a better cyclability. This improved cyclability is mainly related to the different hydrophobic-hydrophilic balance of the Lys@UPG-1 and UPG-1 and the steric protection of the reactive sites of the MOF by the Lys.
PB MDPI
SN 1420-3049
YR 2020
FD 2020-07-31
LK https://hdl.handle.net/10016/31271
UL https://hdl.handle.net/10016/31271
LA eng
NO This research was funded by Raphuel project (ENE2016-79608-C2-1-R, MINECO-AEI/FEDER, UE), a 2017 Leonardo Grant for Researchers and Cultural Creators BBVA Foundation (PolyMOF) and the Ramón Areces Fundation project H+MOFs. PH acknowledges the Spanish Ramon y Cajal Programme (2014-16823). SMFV thanks to the Spanish Ministerio de Educación, Cultura y Deporte for “José Castillejo” mobility programme (Ref. CAS18/00470)
DS e-Archivo
RD 1 sept. 2024