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Driven by renewable electric energy, using electrochemical methods to convert CO2 into carbon-based fuels through carbon dioxide reduction reaction (CO2RR) is an effective way to achieve CO2 conversion and utilization. Considering the requirements for future large-scale industrial application of this technology, finding suitable operating parameters is essential to improve the reaction efficiency and stability. This paper mainly focuses on the more advanced membrane electrode configuration electrolytic cell, used for electrolysis of carbon dioxide to formic acid. Firstly, an electrochemical test platform is built, and a carbon dioxide electrolytic cell based on double membrane structure is designed. Then based on our electrochemical test platform, the effects of parameters such as cathode inlet flow rate, intake humidity, anode electrolyte flow rate and electrolyte temperature on the performance of CO2RR are investigated, in terms of key parameters such as current density and product concentration. Experimental results manifest that when the cathode-to-anode flow rate ratio is 10:1 (the cathode and anode inlet gas flow rate: 20 and 2 mL/min, respectively), the performance of the electrolysis cell can be optimized at appropriate operating temperature (approximately 60 °C) and under high inlet gas humidity.
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