期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 38, 页码 12779-12787出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c03263
关键词
continuous desalination; electrochemical desalination; PEDOT; redox-flow desalination; energy consumption
资金
- National Key Research and Development Program of China [2019YFE0198000]
- Science and Technology Program of Guangzhou [2019050001]
- Scientific and Technological Plan of Guangdong Province [2018A050506078, 2019A050510036]
- Department of Education of Guangdong Province [2019KZDXM014]
- SCNU Outstanding Young Scholar Project [8S0256]
- National Natural Science Foundation of China [U1832104, 91963102]
- Pearl River Talent Program [2019QN01L951]
By electrochemically decorating conducting polymer PEDOT on a graphite foil, the energy consumption of RFD is reduced and the salt removal rate is increased significantly, leading to excellent cycling stability.
Both low-energy consumption and high salt removal rate are highly required in the electrochemical desalination. In this work, a conducting polymer poly(3,4-ethylene-dioxythiophene), i.e., PEDOT, is electrochemically decorated on a graphite foil as an electrode material of redox-flow desalination (RFD). At a current density of 2 mA.cm(-2), the energy consumption of the RFD is reduced to 38.1 kJ.mol(-1) with PEDOT-modified electrodes, compared with 154.5 kJ.mol(-1) using a bare graphite electrode. Meanwhile, the salt removal rate is enhanced to 1.54 mu mol.cm(-2).min(-1) using the PEDOT electrode from 1.11 mu mol.cm(-2).min(-1) in the bare graphite electrode. The PEDOT electrodes can also provide excellent cycling stability. The improved performance may be due to the promising conductivity and porous structure of PEDOT, which would supply more active sites between the electrode and the redox electrolyte. The current research provides an electrochemical desalination strategy with low energy consumption and high salt removal rate, which is significant for the development of RFD technology.
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