Lim, Chulwan Lee, Woong Hee Won, Jong Ho Ko, Young-Jin Kim, Sangkuk Min, Byoung Koun Lee, Kwan-Young Jung, Won Suk Oh, Hyung-Suk 2024-01-19T13:30:13Z 2024-01-19T13:30:13Z 2021-10-21 2021-12 2366-7486 https://pubs.kist.re.kr/handle/201004/116102 To secure the economic feasibility of electrochemical carbon dioxide reduction reaction (CO2RR), a method of using support materials to reduce the amount of catalyst loading and increase catalytic activity for CO2RR can be a solution. Herein, guidelines for selecting carbon support materials suitable for CO2RR are reported. In a gaseous CO2-fed CO2RR electrolyzer, an Ag nanoparticle-composited carbon nanocage (denoted as Ag/CNC) electrode exhibits an optimal performance for CO2RR with a partial current density of approximate to 400 mA cm(-2). Ag/CNC showcases a uniformly dispersed morphology with Ag nanoparticles and sufficient hydrophobicity after the reaction to prevent flooding, which is known to inhibit the mass transfer of CO2. Furthermore, the CNCs possess small amounts of carbon defects; this suppresses the catalytic activity for the hydrogen evolution reaction (HER), which is a side reaction of CO2RR. Results of a three-stack cell experiment with the Ag/CNC electrode reveal the possibility of a support-based strategy for achieving an industrial-level scaling of CO2RR. This study suggests that the support material for CO2RR should be considered not only on the basis of the morphology of carbon, uniform dispersion of Ag nanoparticles, and hydrophobicity of the electrode but also factors influencing the HER, such as carbon defects. English WILEY-V C H VERLAG GMBH Enhancement of Catalytic Activity and Selectivity for the Gaseous Electroreduction of CO2 to CO: Guidelines for the Selection of Carbon Supports Article 10.1002/adsu.202100216 1 Advanced Sustainable Systems, v.5, no.12 Advanced Sustainable Systems 5 12 N scie scopus 000695799300001 2-s2.0-85114885555 Green & Sustainable Science & Technology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article GENERAL TECHNOECONOMIC ANALYSIS OXYGEN REDUCTION ELECTROCHEMICAL REDUCTION ACTIVATED CARBON SINGLE ATOMS DIOXIDE ELECTROLYSIS EFFICIENT NANOPARTICLES CONVERSION carbon dioxide reduction reaction carbon support carbon monoxide hydrophobicity micro computed tomography