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High performance stability of titania decorated carbon for desalination with capacitive deionization in oxygenated water

  • Performance stability in capacitive deionization (CDI) is particularly challenging in systems with a high amount of dissolved oxygen due to rapid oxidation of the carbon anode and peroxide formation. For example, carbon electrodes show a fast performance decay, leading to just 15% of the initial performance after 50 CDI cycles in oxygenated saline solution (5 mM NaCl). We present a novel strategy to overcome this severe limitation by employing nanocarbon particles hybridized with sol-gel-derived titania. In our proof-of-concept study, we demonstrate very stable performance in low molar saline electrolyte (5 mM NaCl) with saturated oxygen for the carbon/metal oxide hybrid (90% of the initial salt adsorption capacity after 100 cycles). The electrochemical analysis using a rotating disk electrode (RDE) confirms the oxygen reduction reaction (ORR) catalytic effect of FW200/TiO2, preventing local peroxide formation by locally modifying the oxygen reduction reaction.

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Document Type:Article
Author:Pattarachai SrimukORCiD, Lucie Ries, Marco ZeigerORCiD, Simon FleischmannORCiD, Nicolas JäckelORCiD, Aura TolosaORCiD, Benjamin KrunerORCiD, Mesut Aslan, Volker PresserORCiD
Parent Title (English):RSC Advances
First Page:106081
Last Page:106089
Year of first Publication:2016
Release Date:2022/11/18
Impact:03.108 (2016)
Funding Information:German Academic Exchange Service (DAAD award number 91579066)
Research Departments:Energie-Materialien
Open Access:Open Access
Signature:INM 2016/111
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International