A novel route for preparing highly proton conductive membrane materials with metal-organic frameworks

Abstract

Fe-MIL-101-NH(2) was prepared by a novel method. The MOFs adhered well to SPPO via chemical bonds, and yielded the mixed-matrix Fe-MIL-101-NH(2)-SPPO membrane for use in fuel cells. The proton conductivity of the membranes was as high as 0.10 S cm(-1) at room temperature and 0.25 S cm(-1) at 90 °C.

Proton exchange nanohybrid membranes with high phosphotungstic acid loading within metal-organic frameworks for PEMFC applications

“…When the filler content is low (3 wt.% and 6 wt.% in this work), the number of hydrolysed H + and hydroxyl groups is not enough to offset the attenuation of sulfonic acid groups caused by MIL101, so that the proton conductivity of nanohybrid membranes is lower than that of SPEEK. And when the filler content is increased (9 wt.% and 12 wt.% in this work), the number of hydroxyl groups is elevated to construct dense successive hydrogen bonding networks for proton transfer, while the unfavorable dilution effect can be compensated [27,41,42]. Consequently, the proton conductivity of SPEEK/MIL nanohybrid membranes exceeds that of SPEEK under high loading.…”

Proton exchange membrane from tetrazole-based poly (phthalazinone ether sulfone ketone) for high-temperature fuel cells

“…Hence, it can be concluded that both tetrazole in side chains and phthalazinone in main chains contribute to the uniform doping of PA in membrane to eliminate "proton conducting gaps". Under anhydrous [34], a reliable proton conducting pathway can be formed by acidbase interactions with tetrazole and phthalazinone groups. Protons transport within hydrogen bonded networks by the forming and breaking of hydrogen bonds (Grotthusmechanium).…”

Adsorption on Mesoporous Metal–Organic Frameworks in Solution: Aromatic and Heterocyclic Compounds

“…Iron is less toxic than chromium, yet there are only few studies of the water stability of MIL‐101(Fe). The MIL‐101(Fe)‐NH 2 32 prepared from dimethyl aminoterephthalate was stable in liquid water33 at room temperature for 24 h. The nanoscale metal‐organic framework (NMOF) of MIL‐101(Fe)‐NH 2 quickly dissolved34 in an aqueous solution of the sodium salt of ethylenediaminetetraacetic acid (Na 4 EDTA) at 37 °C, and it was also unstable in phosphate buffered saline (PBS).…”