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wuyan木虫 (小有名气)
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推荐Nature Chemistry上proton conduction的MOF!
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Nature Chemistry Published online: 18 October 2009 | doi:10.1038/nchem.402 Anhydrous proton conduction at 150 °C in a crystalline metal–organic framework Jeff A. Hurd1, Ramanathan Vaidhyanathan1, Venkataraman Thangadurai1, Christopher I. Ratcliffe2, Igor L. Moudrakovski2 & George K. H. Shimizu1 链接: http://dx.doi.org/10.1038/nchem.402 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 β-PCMOF2), a MOF that conducts protons in regular one-dimensional pores lined with sulfonate groups. Proton conduction in β-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 (β-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. |
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