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Surface Electrochemistry of Carbon Electrodes and Faradaic Reactions in Capacitive Deionization

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Title
Surface Electrochemistry of Carbon Electrodes and Faradaic Reactions in Capacitive Deionization
Author(s)
Jin Soo Kang; Kim, Seoni; Jiho Kang; Joo, Hwajoo; Junghwan Jang; Jo, Kyusik; Subin Park; Kim, Hyoung-il; Yoo, Sung Jong; Yoon, Jeyong; Yung-Eun Sung; Hatton, T. Alan
Publication Date
2022-09
Journal
Environmental Science and Technology, v.56, no.17, pp.12602 - 12612
Publisher
AMER CHEMICAL SOC
Abstract
Recent advances in electrochemical desalination techniques have paved way for utilization of saline water. In particular, capacitive deionization (CDI) enables removal of salts with high energy efficiency and economic feasibility, while its applicability has been challenged by degradation of carbon electrodes in long-term operations. Herein, we report a thorough investigation on the surface electrochemistry of carbon electrodes and Faradaic reactions that are responsible for stability issues of CDI systems. By using bare and membrane CDI (MCDI) as model systems, we identified various electrochemical reactions of carbon electrodes with water or oxygen, with thermodynamics and kinetics governed by the electrode potential and pH. As a result, a complete overview of the Faradaic reactions taking place in CDI was constructed by tracing the physicochemical changes occurring in CDI and MCDI systems.
URI
https://pr.ibs.re.kr/handle/8788114/12854
DOI
10.1021/acs.est.2c03913
ISSN
0013-936X
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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