How does the addition of perchloric acid affect the proton conductivity of β-stannic acid?

Label:chem

Topic
β-Stannic acid is known to exhibit proton conductivity due to its hydrated structure and ion-exchange properties. Perchloric acid, being a strong protonic acid, can potentially enhance the proton conductivity of β-stannic acid through the formation of an adsorption compound.

From: "Vibrational and impedance analysis of the β-stannic acid samples plasticized by perchloric acid", Heliyon, Volume 8, Issue 11, November 2022, e11450
Answer
The addition of perchloric acid significantly increases the proton conductivity of β-stannic acid. The study shows that plasticization with perchloric acid can increase the proton conductivity by more than two orders of magnitude. The maximum conductivity of 0.43 S cm⁻¹ is achieved at a weight fraction of perchloric acid solution (Wpa) of 0.61. This enhancement is attributed to the formation of a gel-like adsorption compound where perchloric acid ions and water molecules fill the pores of β-stannic acid, facilitating proton transport.
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