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Micro and Nanosystems

Author(s): Hamid Ilbeygi*

DOI: 10.2174/1876402913666211006155150

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Facile One-Step Preparation of Mesoporous Siliceous Phophsomolybdic Acid for Proton Exchange Membrane

Page: [387 - 394] Pages: 8

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Abstract

Background: Proton exchange membrane is an art of PEM fuel cells, developing active materials with robust structure and high proton conductivity has attained huge attention in recent decades amongst researchers.

Aims/Objectives: Here, we have developed a novel approach to prepare a siliceous mesoporous heteropoly acid with high stability in polar media and high proton conductivity to be utilized as proton exchange membrane.

Methods: A highly stable mesoporous siliceous phosphomolybdic acid has been synthesized via a simple self-assembly between Phosphomolybdic Acid (PMA), the polymeric surfactant, and the silica precursor stabilized by KCl molecules as a proton conducting material for proton exchange membrane application.

Results: As prepared, siliceous mesoporous phosphomolybdic acids (mPMA-Si) show a high surface area with a highly crystalline structure; however, the crystallinity is reduced by increasing the silica content. Further analysis proved the Keggin structure remains intact in final materials. mPMA-8 Si shows the highest performance among all the materials studied with proton conductivity of 0.263 S.cm-1 at 70 °C.

Conclusion: As prepared, mPMA-xSi has shown a very high proton conductivity in a range of temperatures, making them a promising material for proton exchange membrane.

Keywords: Mesoporous, proton conductivity, heteropoly acids, soft templating, Keggin unit, proton exchange membrane.

Graphical Abstract

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