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Molecules 2017, 22(4), 536; doi:10.3390/molecules22040536

The Mechanism of Room-Temperature Ionic-Liquid-Based Electrochemical CO2 Reduction: A Review

Graduate School of EEWS, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
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Authors to whom correspondence should be addressed.
Academic Editor: Hua Zhao
Received: 10 February 2017 / Revised: 18 March 2017 / Accepted: 25 March 2017 / Published: 28 March 2017
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Abstract

Electrochemical CO2 conversion technology is becoming indispensable in the development of a sustainable carbon-based economy. While various types of electrocatalytic systems have been designed, those based on room-temperature ionic liquids (RTILs) have attracted considerable attention because of their high efficiencies and selectivities. Furthermore, it should be possible to develop more advanced electrocatalytic systems for commercial use because target-specific characteristics can be fine-tuned using various combinations of RTIL ions. To achieve this goal, we require a systematic understanding of the role of the RTIL components in electrocatalytic systems, however, their role has not yet been clarified by experiment or theory. Thus, the purpose of this short review is to summarize recent experimental and theoretical mechanistic studies to provide insight into and to develop guidelines for the successful development of new CO2 conversion systems. The results discussed here can be summarized as follows. Complex physical and chemical interactions between the RTIL components and the reaction intermediates, in particular at the electrode surface, are critical for determining the activity and selectivity of the electrocatalytic system, although no single factor dominates. Therefore, more fundamental research is required to understand the physical, chemical, and thermodynamic characteristics of complex RTIL-based electrocatalytic systems. View Full-Text
Keywords: room-temperature ionic-liquid; carbon dioxide; electrocatalytic system; faradic efficiency; product selectivity room-temperature ionic-liquid; carbon dioxide; electrocatalytic system; faradic efficiency; product selectivity
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Lim, H.-K.; Kim, H. The Mechanism of Room-Temperature Ionic-Liquid-Based Electrochemical CO2 Reduction: A Review. Molecules 2017, 22, 536.

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