What is the role of perchloric acid in the plasticization of β-stannic acid powders?

Label:chem

Topic
Perchloric acid (HClO₄) is a strong acid known for its ability to form stable hydrates and interact with various compounds through hydrogen bonding. β-Stannic acid (SnO₂⋅mH₂O) is a hydrated form of tin dioxide with ion-exchange properties and a porous structure, making it a potential candidate for applications in electrochemical devices. The study investigates the interaction between β-stannic acid and perchloric acid to understand the resulting changes in physical and electrochemical properties.

From: "Vibrational and impedance analysis of the β-stannic acid samples plasticized by perchloric acid", Heliyon, Volume 8, Issue 11, November 2022, e11450
Answer
Perchloric acid acts as a plasticizer for β-stannic acid powders, transforming them into a viscous, transparent gel. This plasticization effect is due to the adsorption of perchloric acid ions and water molecules into the pores/capillaries of β-stannic acid, leading to significant changes in its mechanical properties and proton conductivity. The resulting material exhibits high proton conductivity and catalytic properties, making it suitable for applications in electrochemical devices such as hydrogen sensors.
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