Non-humidified proton conduction between a Lewis acid–base pair

Abstract

Proton conduction in zirconium sulphate (ZrSO4) composed of a Lewis acid-base pair was studied. ZrSO4 exhibits non-humidified proton conductivity, comparable to other proton conductors under similar conditions. Ab initio calculation shows that a proton transfers in ZrSO4 from a Lewis acid to a Lewis base without a proton carrier.

Proton Conductivity in {Mo72Fe30}‐Type Keplerate

“…It has been shown in the past that the presence of Lewis acid centres could be highly favourable for the generation and migration of protons [43] . A water molecule captured by a Lewis acid within a framework can easily dissociate a proton and become a proton acceptor thereafter [44] . The Lewis acidic ferric ions Fe(III) hence have the potential to promote the elimination of a proton from the coordinated water molecule.…”

“…[43] A water molecule captured by a Lewis acid within a framework can easily dissociate a proton and become a proton acceptor thereafter. [44] The Lewis acidic ferric ions Fe(III) hence have the potential to promote the elimination of a proton from the coordinated water molecule. This deprotonation of the Fe(III)-OH is also observed during the self-assembling process of the {Mo Fe 30 } into blackberry-type structures as reported by Liu et al [45,46] Therefore, the acidic Fe III -OH 2 groups appear to be the most plausible source for the generation of mobile protons which along with lattice waters is responsible for the proton conductivity observed in compound 1.…”

Comprehensive Analysis of Trends and Emerging Technologies in All Types of Fuel Cells Based on a Computational Method

“…Otherwise, inorganic particles are considered to help the phase separation of polymer electrolytes and to form well-aggregated hydrophilic phases, thus facilitating H + conduction [69,70]. Some solid acids, such as CsHSO 4 and 12-phosphotungstic acid [71][72][73][74], show high proton conductivity under non-humidified conditions and have been investigated intensely, although they are generally water soluble and not suitable for practical use. Researchers in this cluster tested various combinations of inorganic and organic electrolytes to achieve the ideal properties.…”

Lewis Acid Guests in a {P8W48} Archetypal Polyoxotungstate Host: Enhanced Proton Conductivity via Metal‐Oxo Cluster within Cluster Assemblies

“…Recent advances elucidated that the introduction of Lewis acid centers into porous crystalline materials, such as aluminosilicate zeolites, could be highly beneficial for the migration of protons . Within the framework, a water molecule captured by a Lewis acid could easily dissociate one proton and become a proton acceptor thereafter . Inspired by this, the combination of strong Lewis acids (e.g., Al III ions) with POM matrices (e.g., P 8 W 48 ) might integrate the instinct proton‐transferring properties of both in a quest to boost the conductivity, which is essentially vital in fuel cell technology.…”