Proton Conduction in a Single Crystal of a Phosphonato-Sulfonate-Based Coordination Polymer: Mechanistic Insight
Open Access
- 2 April 2020
- journal article
- research article
- Published by Wiley in Chemphyschem
- Vol. 21 (7), 605-609
- https://doi.org/10.1002/cphc.202000102
Abstract
The proton conduction properties of a phosphonato-sulfonate-based coordination polymer are studied by impedance spectroscopy using a single crystal specimen. Two distinct conduction mechanisms are identified. Water-mediated conductance along the crystal surface occurs by mass transport, as evidenced by a high activation energy (0.54 eV). In addition, intrinsic conduction by proton ' hopping ' through the interior of the crystal with a low activation energy (0.31 eV) is observed. This latter conduction is anisotropic with respect to the crystal structure and seems to occur through a channel along the c axis of the orthorhombic crystal. Proton conduction is assumed to be mediated by sulfonate groups and non-coordinating water molecules that are part of the crystal structure.Funding Information
- Deutsche Forschungsgemeinschaft
This publication has 22 references indexed in Scilit:
- Proton Conduction in Metal–Organic Frameworks and Related Modularly Built Porous SolidsAngewandte Chemie, 2013
- Recent advances in proton exchange membranes for fuel cell applicationsChemical Engineering Journal, 2012
- Cost effective cation exchange membranes: A reviewChemical Engineering Research and Design, 2012
- Inherent Proton Conduction in a 2D Coordination FrameworkJournal of the American Chemical Society, 2012
- Advances in the high performance polymer electrolyte membranes for fuel cellsChemical Society Reviews, 2012
- Sulfonated hydrocarbon membranes for medium-temperature and low-humidity proton exchange membrane fuel cells (PEMFCs)Progress in Polymer Science, 2011
- High and Highly Anisotropic Proton Conductivity in Organic Molecular Porous MaterialsAngewandte Chemie, 2011
- Proton Exchange Membranes for Fuel Cell ApplicationsJournal of Macromolecular Science, Part C: Polymer Reviews, 2006
- Water Uptake by and Transport Through Nafion® 117 MembranesJournal of the Electrochemical Society, 1993
- Vehicle Mechanism, A New Model for the Interpretation of the Conductivity of Fast Proton ConductorsAngewandte Chemie, 1982