Exploring the critical role of binders in electrochemical CO2 reduction reactions

Chae, Younghyun; Kim, Hyunwook; Lee, Dong Ki; Lee, Ung; Won, Da Hye

doi:10.1016/j.nanoen.2024.110134

Nano Energy

2024

DOI: 10.1016/j.nanoen.2024.110134

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Exploring the critical role of binders in electrochemical CO2 reduction reactions

Younghyun Chae,

Hyunwook Kim,

Dong Ki Lee

et al.

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Comparative Study of Different Polymeric Binders in Electrochemical CO Reduction

Galbicsek,

Kormányos,

Samu

et al. 2024

Energy Fuels

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Electrochemical reduction of carbon monoxide offers a possible route to produce valuable chemicals (such as acetate, ethanol or ethylene) from CO 2 in two consecutive electrochemical reactions. Such deeply reduced products are formed via the transfer of 4−6 electrons per CO molecule. Assuming similar-sized CO 2 and CO electrolyzers, 2−3-times larger current densities are required in the latter case to match the molar fluxes. Such high reaction rates can be ensured by tailoring the structure of the gas diffusion electrodes. Here, the structure of the cathode catalyst layer was systematically varied using different polymeric binders to achieve high reaction rates. Simple linear polymers, bearing the same backbone but different functional groups were compared to highlight the role of different structural motifs. The comparison was also extended to simple linear, partially fluorinated polymers. Interestingly, in some cases similar results were obtained as with the current state-of-the-art binders. Using different surface-wetting characterization techniques, we show that the hydrophobicity of the catalyst layer�provided by the binder� is a prerequisite for high-rate CO electrolysis. The validity of this notion was demonstrated by performing CO electrolysis experiments at high current density (1 A cm −2 ) for several hours using PVDF as the catalyst binder.

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Comparative Study of Different Polymeric Binders in Electrochemical CO Reduction

Galbicsek,

Kormányos,

Samu

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

show abstract

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Exploring the critical role of binders in electrochemical CO2 reduction reactions

Cited by 1 publication

References 106 publications

Comparative Study of Different Polymeric Binders in Electrochemical CO Reduction

Comparative Study of Different Polymeric Binders in Electrochemical CO Reduction

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