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Proton Conduction in Sulfonated Organic–Inorganic Hybrid Monoliths with Hierarchical Pore Structure

Title data

von der Lehr, Martin ; Seidler, Christopher F. ; Taffa, Dereje H. ; Wark, Michael ; Smarsly, Bernd M. ; Marschall, Roland:
Proton Conduction in Sulfonated Organic–Inorganic Hybrid Monoliths with Hierarchical Pore Structure.
In: ACS Applied Materials & Interfaces. Vol. 8 (28 September 2016) Issue 38 . - pp. 25476-25488.
ISSN 1944-8244
DOI: https://doi.org/10.1021/acsami.6b08477

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Porous organic–inorganic hybrid monoliths with hierarchical porosity exhibiting macro- and mesopores are prepared via sol–gel process under variation of the mesopore size. Organic moieties in the pore walls are incorporated by substituting up to 10% of the silicon precursor tetramethylorthosilicate with bisilylated benzene molecules. After functionalization with sulfonic acid groups, the resulting sulfonated hybrid monoliths featuring a bimodal pore structure are investigated regarding proton conduction depending on temperature and relative humidity. The hierarchical pore system and controlled mesopore design turn out to be crucial for sulfonation and proton conduction. These sulfonated hybrid hierarchical monoliths containing only 10% organic precursor exhibit higher proton conduction at different relative humidities than sulfonated periodic mesoporous organosilica made of 100% bisilylated precursors exhibiting solely mesopores, even with a lower concentration of sulfonic acid groups.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Lehrstuhl Physikalische Chemie III > Lehrstuhl Physikalische Chemie III - Univ.-Prof. Dr. Roland Marschall
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 05 Sep 2018 06:35
Last Modified: 30 Oct 2018 07:40
URI: https://eref.uni-bayreuth.de/id/eprint/45713