Electrochemical Peroxodisulfate (PDS) Generation on a Self-Doped TiO2 Nanotube Array Electrode
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-07-31 |
| Journal | Industrial & Engineering Chemistry Research |
| Authors | Jiye Kim, Changha Lee, Jeyong Yoon |
| Institutions | Ulsan National Institute of Science and Technology, Seoul National University |
| Citations | 29 |
Abstract
Section titled āAbstractāPeroxodisulfate (PDS, S2O82-) is one of the strong oxidants (E degrees[S2O82-/HSO4-] = 2.12 V-NHE), which is widely used for radical polymerization or wastewater treatment. In electrochemical PDS generation, its efficiency highly depends on the center dot OH generating electrode materials. A boron-doped diamond (BDD) used in electrochemical PDS generation is very expensive prompting the need for new electrode materials for PDS generation. This study reports the self-doped TiO2 nanotube array electrodes (blue and black TNAs) for PDS generation which are cheap and effective for generating a significant amount of center dot OH and comparable to BDD electrodes. Blue and black TNA electrodes were excellent for PDS generation exhibiting high current efficiencies for PDS generation (46% and 22%, respectively). Similar to the BDD electrode, it was also confirmed that center dot OH was the key precursor to the PDS generation on the self-doped TNA electrodes from the linear relationship between the PDS generation rate and center dot OH generation