Breakthrough Idea for CCU Technology Commercialization from 'Carbon Cycle of the Earth'

Credit: Korea Institute of Science and Technology

The upper figure depicts the CO₂ reduction reaction at an appropriate current density, while the lower figure illustrates the CO₂ reduction reaction at a high current density in a diagrammatic form. In the CO₂ reduction reaction, hydroxide ions (OH⁻) are generated more abundantly at high current densities, combining with CO₂ and preventing its transfer to the catalyst surface, which reduces performance.

« Breakthrough Idea for CCU Technology Commercialization from 'Carbon Cycle of the Earth'

Credit: Korea Institute of Science and Technology

This diagram represents the silica-hydroxide cycle occurring during the electrochemical CO₂ reduction reaction using a silver-silica reduction electrode. The silica undergoes a weathering effect due to the hydroxide ions generated during the CO₂ reduction reaction, dissolving into a liquid state and then precipitating back near the anion exchange membrane, transforming back into silica on the reduction electrode, enabling a reversible process. This process prevents the hindered transfer of CO₂, allowing high-performance CO₂ electrolysis.

« Breakthrough Idea for CCU Technology Commercialization from 'Carbon Cycle of the Earth'

Credit: Korea Institute of Science and Technology

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« Breakthrough Idea for CCU Technology Commercialization from 'Carbon Cycle of the Earth'

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