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Issue 108, 2016, Issue in Progress
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High performance stability of titania decorated carbon for desalination with capacitive deionization in oxygenated water

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Abstract

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.

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

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Supplementary files

Article information


Submitted
12 Sep 2016
Accepted
28 Oct 2016
First published
01 Nov 2016

This article is Open Access

RSC Adv., 2016,6, 106081-106089
Article type
Communication

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

P. Srimuk, L. Ries, M. Zeiger, S. Fleischmann, N. Jäckel, A. Tolosa, B. Krüner, M. Aslan and V. Presser, RSC Adv., 2016, 6, 106081
DOI: 10.1039/C6RA22800C

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