Ti2O3 film electrode for water treatment via electrochemical chlorine evolution

Yishu Zhang, Caroline Kirk*, Neil Robertson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This work introduces a low-cost and earth-abundant Ti2O3 thin film electrode as the anode for chlorine-driven electrochemical water treatment. A simple method of immobilizing Ti2O3 powder onto a conductive glass substrate has been developed and studied. Electrochemical characterization showed that the chlorine evolution reaction (CER) was more favorable than the oxygen evolution reaction (OER) for the Ti2O3 film electrode. The Ti2O3 film electrode showed high efficiency of free chlorine production, which leads to a good performance in degrading methyl orange (97.9% in 1.5 h) and tetracycline (78.0% in 1.5 h) via chlorine evolution. Pollutant degradation reaction by chlorine is observed to be the major reaction (75%) in this electrochemical water treatment system, while direct electron transfer (DET) reaction also contributed to pollutant degradation. Ti2O3 film electrodes can work efficiently for several cycles with the help of an easy regeneration step between cycles.

Original languageEnglish
Pages (from-to)1631-1638
JournalMaterials Advances
Volume5
Issue number4
Early online date5 Jan 2024
DOIs
Publication statusPublished - 5 Jan 2024

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