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

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DOIResolve DOI: http://doi.org/10.1038/nchem.402
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TypeArticle
Journal titlenature chemistry
Volume1
Issue9
Pages705710; # of pages: 6
Subjectporosity; diversity; crystallinity; frameworks; guest molecules; sulfonate; proton; electrode
AbstractMetal 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
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Steacie Institute for Molecular Sciences
Peer reviewedYes
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This is a non-NRC publication

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NPARC number16140205
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Record identifier4d843089-e626-4b66-9ef5-db767f8d05a1
Record created2010-12-13
Record modified2016-05-09
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