Authors:

Amber K Wang

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About Paper:

For many years, traditional deoxygenation methods, including gloveboxes and inert gas purging systems, have been essential for air- and moisture-sensitive electroanalysis. These techniques have offered opportunities to make discoveries in systems that are not naturally accessible in ambient conditions. However, these methods are costly, require diligent maintenance, and pose contamination risks that limit accessibility. Here, we propose an alternative and cost-effective approach to creating and maintaining a hypoxic environment for electroanalysis by taking electrochemical measurements in a fish tank filled with a dense gas blanket. Sulfur hexafluoride (SF6), butane, and argon gases were investigated by collecting a series of cyclic voltammograms to study the oxygen reduction reaction over an extended period under a blanket of each gas. We show that the oxygen reduction reaction peak returns significantly slower in the presence of SF6 than in systems with less dense gases like argon or butane. Our results support the effective use of a dense gas blanket to prevent atmospheric oxygen diffusion, conserving hypoxic conditions suitable for oxygen-sensitive electroanalysis that mitigate the need for costly equipment. Keywords: Hypoxic Environment; Electroanalysis; Sulfur Hexafluoride; Cyclic Voltammetry; Fish Tank

Source:

Purdue University / 2025

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Co-authors:

Amber K Wang