Integrated Process for Structuring and Functionalizing Ordered Mesoporous Silica to Achieve Superprotonic Conductivity

نویسندگان

چکیده

Polyacid-functionalized inorganic mesoporous materials have attracted considerable interest as catalysts, permselective molecular sieves, or drug carriers. Despite the great interest, their synthesis into ordered mesostructures incorporating polyacids densely and homogeneously distributed in mesopores is a challenge. Moreover, properties conductors for energy applications remain completely unexplored. Here, we report an efficient, one-shot environmentally friendly route to prepare silica functionalized with strong polyacids, which exhibits excellent proton conductivity. We used polyion electrostatic complex micelles structure-directing, functionalizing, pore-generating agents obtain material of remarkable textural functional quality. It presents large hosting monodisperse polyacid chains corresponding dense homogeneous functionalization 1.2 mmolSO3H gSiO2–1 function density 1 SO3H per nm3 mesopore volume. Overcoming performance-limiting inhomogeneities, designed superprotonic conductor, while high value conductivity, 0.024 S cm–1 at 363 K/95% relative humidity, was maintained least 7 days.

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ژورنال

عنوان ژورنال: Chemistry of Materials

سال: 2022

ISSN: ['1520-5002', '0897-4756']

DOI: https://doi.org/10.1021/acs.chemmater.2c01352