Document Type
Article
Publication Date
2-7-2024
Abstract
Hexavalent chromium is a contaminant of concern and is found in drinking water supplies. Electrochemical methods are well-suited to accomplish the reduction of toxic Cr(VI) to Cr(III). However, high overpotentials and plating of Cr(III) products on electrodes have stymied the development of efficacious purification methods. The Cr(VI) reduction reaction necessitates the transfer of multiple protons and electrons, which is accompanied by a high kinetic barrier. Following recent advances in the electrocatalytic energy storage community, we report that the use of [Fe(CN)6]3- as a small molecular electrocatalyst not only diminishes the overpotential for Cr(VI) reduction on carbon electrodes by 0.575 V, but also prevents electrode fouling by mediating solution-phase homogeneous electron transfers.
Publication Source (Journal or Book title)
ACS Organic and Inorganic Au
First Page
113
Last Page
119
Recommended Citation
Stern, C., Abeythunga, M., & Elgrishi, N. (2024). Advancing Cr(VI) Electroreduction: A Redox Mediator to Catalyze the Electrochemical Reduction of Cr(VI) in Water While Preventing Fouling of Carbon Electrodes. ACS Organic and Inorganic Au, 4 (1), 113-119. https://doi.org/10.1021/acsorginorgau.3c00034