Selective, high efficiency reduction of CO2 in a non-diaphragm-based electrochemical system at low applied voltage

Kwang-Jin Yim; Dong-Keun Song; Chan-Soo Kim; Nam-Gyu Kim; Toru Iwaki; Takashi Ogi; Kikuo Okuyama; Sung-Eun Lee; Tae-Oh Kim

doi:10.1039/C4RA14427A

Selective, high efficiency reduction of CO₂ in a non-diaphragm-based electrochemical system at low applied voltage†

Kwang-Jin Yim,‡^a Dong-Keun Song,‡^b Chan-Soo Kim,‡^c Nam-Gyu Kim,^a Toru Iwaki,^d Takashi Ogi,^d Kikuo Okuyama,^d Sung-Eun Lee*^e and Tae-Oh Kim*^a

Author affiliations

* Corresponding authors

^a Department of Environmental Engineering, Kumoh National Institute of Technology, Daehak-ro 61, Gumi, Gyeongbuk 730-701, Republic of Korea
E-mail: tokim@kumoh.ac.kr
Fax: +82-54-478-7641
Tel: +82-54-478-7634

^b Department of Eco-Machinery Systems, Environmental and Energy Systems Research Division, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong, Daejeon 305-343, Republic of Korea

^c Marine Energy Convergence & Integration Laboratory, Jeju Global Research Center, Korea Institute of Energy Research, Republic of Korea

^d Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima 739-8527, Japan

^e School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
E-mail: selpest@knu.ac.kr
Fax: +82-53-953-7233
Tel: +82-53-950-7768

Abstract

In a typical electrochemical CO₂ reduction system, hydrocarbon products are not selectively generated when a diaphragm is used in the cell. However, without the diaphragm, H₂ and CH₄ are selectively produced with Faradaic efficiencies as high as 96.7% in methanolic NaOH and KOH electrolytes, respectively. We are the first to successfully achieve the selective production of hydrocarbon and hydrogen fuels from the electrochemical reduction of CO₂, which can help to meet the rapidly growing energy demands of modern society.

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Article information

DOI: https://doi.org/10.1039/C4RA14427A
Article type: Communication
Submitted: 13 Nov 2014
Accepted: 22 Dec 2014
First published: 22 Dec 2014

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RSC Adv., 2015,5, 9278-9282

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Selective, high efficiency reduction of CO₂ in a non-diaphragm-based electrochemical system at low applied voltage

K. Yim, D. Song, C. Kim, N. Kim, T. Iwaki, T. Ogi, K. Okuyama, S. Lee and T. Kim, RSC Adv., 2015, 5, 9278 DOI: 10.1039/C4RA14427A

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