Fabrication of novel phosphotungstic acid functionalized mesoporous silica composite membrane by alternative gel-casting technique

Exceptional durability enhancement of PA/PBI based polymer electrolyte membrane fuel cells for high temperature operation at 200 °C

“…[21][22][23][24] It is therefore of great interest to improve the long term stability under such challenging operating conditions, where the utilization of composite membranes has proven a successful approach. [25][26][27] The proton conductivity and cell performance of composite membrane can be improved by incorporating functionalized nano-or mesoporous silica materials such as phosphorylated hollow mesoporous silica submicrospheres, 28 PBIfunctionalized silica nanoparticles, 29 ionic liquid-functionalized mesoporous silica, 30 phosphotungstic acid functionalized mesoporous silica by gel-casting technique, 31 and proton conducting groups functionalized mesoporous silica. 32 We have previously reported that phosphotungstic acid (H3PW12O40·nH2O, PWA) functionalized mesoporous silica (PWA-meso-SiO2) shows high proton conductivity of 34 mS cm -1 and encouraging fuel cell performance at 200 °C.…”

Facile Preparation of Phosphotungstic Acid-Impregnated Yeast Hybrid Microspheres and Their Photocatalytic Performance for Decolorization of Azo Dye

“…These groups are connected to each other by corner-sharing oxygen [28,29]. This structure generates different types of oxygen atoms, which are responsible for the signature of FT-IR bands for the Keggin anions below 1100 cm −1 [30,31]. The main adsorption peak at 1080.12 cm −1 is ascribed to P-Oa stretching and the peak at 981.75 cm −1 derives from W=Od stretching.…”

Amino-functionalized mesoporous silica based polyethersulfone–polyvinylpyrrolidone composite membranes for elevated temperature proton exchange membrane fuel cells

“…That is, reducing the PVP content would decrease the proton conductivity of the composite membrane with the increased mechanical strength of the membranes. 14 Nevertheless, the proton conductivity of composite membranes can be improved by incorporating functionalized nano-or mesoporous silica materials such as phosphorylated hollow mesoporous silica (HMS) submicro spheres 16 , PBI-functionalized silica nanoparticles 17 , ionic liquid-functionalized mesoporous silica 18 , phosphotungstic acid functionalized mesoporous silica 19 , and proton conducting groups functionalized mesoporous silica 20 . Among them, functionalized HMS shows the high water uptake due to a large amount of lumen and facilitated proton transportation in the functionalized mesoporous silica channels.…”