Details

Autor(en) / Beteiligte

• Zargarian, Mitra
• Ansari, Amin
• Masoumi, Hossein
• Nematollahi, Davood
• Shabanloo, Amir
• Eslamipanah, Mahtab
• Jaleh, Babak

Titel

Improved electrocatalytic degradation of toxic and resistant picric acid with PbO2-ZrO2 anode; New insight into degradation mechanism by a DFT approach

Ist Teil von

• Journal of environmental chemical engineering, 2023-06, Vol.11 (3), p.110280, Article 110280

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The convergent paired electrochemical degradation of 2,4,6-trinitrophenol (TNP) was studied on a PbO2 anode modified with zirconium dioxide nanoparticles (ZrO2. NPs). The ZrO2. NPs are perfectly able to improve the lifetime of graphite/β-PbO2-ZrO2 anode and increase its oxygen evolution potential. Using this electrode, we achieved a COD removal efficiency of 87% after 105 min. This study also provides a new insight into the electrodegradation mechanism of TNP and proves that both electrode processes are involved in the degradation of TNP. The important section of this research is to suggest a detailed mechanism for the electrochemical reduction of TNP along with a detailed suggestion of all possible pathways in the oxidation of cathodically produced 2,4,6-triaminophenol (TAP). Accordingly, the convergent paired degradation of TNP involves reduction of TNP at the cathode and oxidation of TAP at the anode. We have also performed DFT calculations to get deeper insights for the degradation mechanism of TNP. [Display omitted] •Convergent paired ‎electrocatalytic degradation of picric acid.•A new insight into the electrochemical degradation mechanism.•Developed a mixed metal oxide PbO2-ZrO2/graphite electrode as an anode.•Proposed a detailed reaction mechanism for the electrochemical reduction of picric acid.•Suggestion of all possible pathways in the oxidation of produced 2,4,6-triaminophenol.