Anhydrous proton conduction at 150°C in a crystalline metal–organic framework

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1038/nchem.402
Author	Search for: Hurd, Jeff A.; Search for: Vaidhyanathan, Ramanathan; Search for: Thangadurai, Venkataraman; Search for: Ratcliffe, Christopher I.¹; Search for: Moudrakovski, Igor L.¹; Search for: Shimizu, George K. H.
Affiliation	National Research Council of Canada. NRC Steacie Institute for Molecular Sciences
Format	Text, Article
Subject	porosity; diversity; crystallinity; frameworks; guest molecules; sulfonate; proton; electrode
Abstract	Metal organic frameworks (MOFs) are particularly exciting materials that couple porosity, diversity and crystallinity. But although they have been investigated for a wide range of applications, MOF chemistry focuses almost exclusively on properties intrinsic to the empty frameworks; the use of guest molecules to control functions has been essentially unexamined. Here we report Na3(2,4,6-trihydroxy-1,3,5-benzenetrisulfonate) (named ?-PCMOF2), a MOF that conducts protons in regular one-dimensional pores lined with sulfonate groups. Proton conduction in ?-PCMOF2 was modulated by the controlled loading of 1H-1,2,4-triazole (Tz) guests within the pores and reached 5 10-4 S cm-1 at 150 °C in anhydrous H2, as confirmed by electrical measurements in H2 and D2, and by solid-state NMR spectroscopy. To confirm its potential as a gas separator membrane, the partially loaded MOF (?-PCMOF2(Tz)0.45) was also incorporated into a H2/air membrane electrode assembly. The resulting membrane proved to be gas tight, and gave an open circuit voltage of 1.18 V at 100 °C.
Publication date	2009-10-18
In	nature chemistry 1, no. 9 (18 October 2009): 705–710.
Language	English
Peer reviewed	Yes
NRC publication	This is a non-NRC publication "Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.
NPARC number	16140205
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Record identifier	4d843089-e626-4b66-9ef5-db767f8d05a1
Record created	2010-12-13
Record modified	2020-04-16

Date modified:: 2024-07-21