CO2還元反応の論文がEES Catalysis誌2024年6号のInside front coverに採択されました。
Our paper on CO2 reduction reaction has been employed as the inside front cover of EES Catalysis, Issue 6, 2024.
K. Nomoto, T. Okazaki, K. Beppu, T. Shishido, F. Amano*, "Highly Selective Formate Formation via Bicarbonate Conversions", EES Catalysis, 2(6), pp 1277–1284, 2024, https://doi.org/10.1039/D4EY00122B
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Broader context Carbon capture and utilization to convert atmospheric CO2 into useful chemicals and fuels is essential for achieving a carbon-neutral or negative emission future. Electrochemical CO2 reduction reaction (CO2RR) can directly produce formate, carbon monoxide, ethylene, and other compounds using renewable energy at room temperature and pressure. However, significant energy is lost in supplying high-purity CO2 to conventional CO2RR reactors with a gas-diffusion electrode, which also suffers from low carbon utilization efficiency. Reactive carbon capture, which converts CO2 dissolved in alkaline solutions, addresses these challenges. We report a liquid bicarbonate-fed electrolyzer for formate production with a high selectivity (faradaic efficiency) of 85% at a high rate (current density) of 300 mA cm−2. This highly selective formate production utilizes electrocatalytically inactive bicarbonate (hydrogen carbonate), avoiding the energy-intensive CO2 separation and purification processes and enhancing carbon utilization efficiency. Formate, the smallest carboxylate, is expected to serve as an energy carrier for direct formate fuel cells. Thus, this bicarbonate electrolyzer contributes to realizing a decarbonized society through green transformation. |