화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.116, 191-198, December, 2022
DOI10.1016/j.jiec.2022.09.009  Export Citation
Selective production of ethylene from CO2 over CuAg tandem electrocatalysts
Ye Eun Jeon, You Na Ko, Jongseok Kim1, Hyuk Choi1, Wonhee Lee, Young Eun Kim, Doohwan Lee2, Hyun You Kim1, and Ki Tae Park3, †
  • Climate Change Research Division, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
  • 1Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
  • 2Department of Chemical Engineering, University of Seoul, 163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul 02504, Republic of Korea
  • 3Department of Chemical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
E-mail:
The electrochemical reduction reaction of CO2 (CO2RR) is desirable for decreasing CO2 concentration in the atmosphere and producing value-added chemicals. The development of advanced catalysts is a key challenge for the practical application of CO2RR. Recently, the bimetallic catalysts with two or more reaction sites acting synergistically are one of the most interesting catalysts. Herein, CuAg bimetallic catalysts with various Cu/Ag ratios are synthesized by the ultrasonic spray pyrolysis (USP) method for the selective production of ethylene (C2H4) via CO2RR. The electrocatalytic performances of the CuAg catalysts with different compositions are evaluated in a full flow single cell and the Cu90Ag10 exhibits 1.5 times the higher C2H4 Faradaic efficiency and the C2H4 current density at a cell voltage of 2.2 V than the bare Cu. Ag in the bimetallic catalysts provides additional CO via desorption-re-adsorption and diffusion process for CAC coupling on the Cu surface to synthesize C2H4. In addition, the improved performance of the Cu90Ag10 is attributed to not only the synergistic effect between Cu and Ag but also the appropriate Cu/ Ag ratio.
Keywords:Carbon dioxide;CO2 electroreduction;Ethylene;Cu;Ag;Bimetallic catalyst
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