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Updated: Jul 8, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Bridging in situ measurements and practical conditions through gas-liquid management for CO/CO2 reduction
Yingqi Liu1, Gyeongrok Jang1,2, Jungwon Park1,2,3,4,5
1School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea. jungwonpark@snu.ac.kr.
None:
Electrochemical CO2 and CO reduction reactions (CO(2)RRs) have attracted growing interest for sustainable carbon conversion. Characterizing catalyst dynamics and reaction intermediates under operating conditions is important, but gas-electrolyte dynamics make in situ measurements more challenging and can complicate mechanistic interpretation. This review starts from electrochemical cell configurations and classifies them according to their gas-liquid configuration, including H-type cells, flow cells, and membrane-electrode assembly (MEA) devices that represent no gas-liquid separation, gas-liquid separation, and membrane-confined reaction, respectively. We then summarize representative in situ cell designs under this classification and discuss their applications across different characterization techniques, as well as how the gas-liquid environment affects the observed results and mechanistic interpretation. Finally, we provide perspectives on bridging the gap between in situ characterization and practical device conditions to establish reliable structure-activity relationships in future CO(2)RR studies.
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