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Ionophore Paper ChemRXIV FINAL.pdf (2.51 MB)
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Ionophore-Assisted Electrochemistry of Neutral Molecules: Oxidation of Hydrogen in an Ionic Liquid Electrolyte

preprint
revised on 18.10.2019 and posted on 22.10.2019 by Johannes Wandt, Junqiao Lee, Damien Arrigan, Debbie Silvester

The electrochemical properties of gas molecules are of great interest for both fundamental and applied research. In this study, we introduce a novel concept to systematically alter the electrochemical behavior and, in particular, the redox potential of neutral gas molecules. The concept is based on the use of an ion-binding agent, or ‘ionophore’, to bind and stabilize the ionic electrochemical reaction product. We demonstrate that the ionophore-assisted electrochemical oxidation of hydrogen in a room temperature ionic liquid electrolyte is shifted by almost 1 V towards more negative potentials in comparison to an ionophore-free electrolyte. The altered electrochemical response in the presence of the ionophore not only yields insights into the reaction mechanism but can be used also to determine the diffusion coefficient of the ionophore species. This ionophore-modulated electrochemistry of neutral gas molecules opens up new avenues for the development of highly selective electrochemical sensors.

Funding

Gelled electrolyte materials for toxic gas sensing

Australian Research Council

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DAAD Scholarship

History

Email Address of Submitting Author

d.silvester-dean@curtin.edu.au

Institution

Curtin University

Country

Australia

ORCID For Submitting Author

0000-0002-7678-7482

Declaration of Conflict of Interest

No conflict of interest

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