Redox Electrochemistry of Mn(II) via Carbon Black Nanoparticle Impacts

Molly Keal, James Courtney, Neil V. Rees*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The field of impact electrochemistry, namely, electrochemical processes occurring at nanoparticles during collisions with a substrate electrode, has recently been applied to the recovery of commercially important metals. In this study, the reduction and oxidation of solution Mn(II) were observed on carbon black particles during nanoimpacts, with the onset potentials of the reduction and oxidation processes in good agreement with solution voltammetry. The formation of Mn(0) and MnO2 was confirmed via scanning electron microscopy/energy-dispersive X-ray (SEM/EDX) analysis and X-ray photoelectron spectroscopy (XPS) analysis. Coverages of between 0.2 and 0.6 monolayer equivalents were obtained for the reductive deposition of Mn, whereas for the anodic deposition of MnO2, a more complex picture was found due to the oxidation pathway from Mn(II) to MnO2.
Original languageEnglish
Pages (from-to)13380-13388
Number of pages9
JournalJournal of Physical Chemistry C
Volume127
Issue number27
Early online date28 Jun 2023
DOIs
Publication statusPublished - 13 Jul 2023

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