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Y Combined Effect of Catholyte Gap and Cell Voltage on Syngas Ratio in Continuous CO2/H2O Co-electrolysis SCIE SCOPUS

Title
Y Combined Effect of Catholyte Gap and Cell Voltage on Syngas Ratio in Continuous CO2/H2O Co-electrolysis
Authors
Ha, Min GwanNa, YoungseungPark, Hee YoungKim, Hyoung-JuhnSong, JuhunYoo, Sung JongKim, Yong-TaePark, Hyun S.Jang, Jong Hyun
Date Issued
2021-11
Publisher
The Korean Electrochemical Society
Abstract
Electrochemical devices are constructed for continuous syngas (CO + H2) production with controlled selectivity between CO2 and proton reduction reactions. The ratio of CO to H2, or the faradaic efficiency toward CO generation, was mechanically manipulated by adjusting the space volume between the cathode and the polymer gas separator in the device. In particular, the area added between the cathode and the ion-conducting polymer using 0.5 M KHCO3 catholyte regulated the solution acidity and proton reduction kinetics in the flow cell. The faradaic efficiency of CO production was controlled as a function of the distance between the polymer separator and cathode in addition to that manipulated by the electrode potential. Further, the electrochemical CO2 reduction device using Au NPs presented a stable operation for more than 23 h at different H2:CO production levels, demonstrating the functional stability of the flow cell utilizing the mechanical variable as an important operational factor.
URI
https://oasis.postech.ac.kr/handle/2014.oak/109438
DOI
10.33961/jecst.2021.00220
ISSN
2093-8551
Article Type
Article
Citation
Journal of Electrochemical Science and Technology, vol. 12, no. 4, page. 406 - 414, 2021-11
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