A High Proton Conductive Hydrogen-Sulfate Decorated Titanium Carboxylate Metal−Organic Framework

Abstract : A hydrolytically stable titanium carboxylate-based metal−organic framework (MOF), incorporating hydrogen-sulfate functions bounded to Ti-metal sites and named MIP-177-SO4H-LT, was prepared using a green and simple synthesis protocol. This solid exhibits a very high proton conductivity of 2.6 × 10–2 S cm–1 at 298 K and 95% relative humidity as evidenced by impedance spectroscopy measurements. This high level of performance maintained over 7 days combined with a very good chemical stability and green synthesis route positions this MOF as a promising candidate for further deployment as a proton-exchange membrane. Ab initio Molecular Dynamics simulations and advanced characterization tools (IR, UV–vis, TGA–MS) were further coupled to reveal a water-mediated proton transport Grotthuss-like mechanism.
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https://hal.umontpellier.fr/hal-02088567
Contributeur : Odile Hennaut <>
Soumis le : mercredi 3 avril 2019 - 08:45:47
Dernière modification le : mardi 28 mai 2019 - 14:06:15

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Mohammad Wahiduzzaman, Sujing Wang, Josefine Schnee, Alexandre Vimont, Vanessa Ortiz, et al.. A High Proton Conductive Hydrogen-Sulfate Decorated Titanium Carboxylate Metal−Organic Framework. ACS Sustainable Chemistry & Engineering, American Chemical Society, 2019, 7 (6), pp.5776-5783. ⟨10.1021/acssuschemeng.8b05306⟩. ⟨hal-02088567⟩

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