Design of membrane electrolysis cell for CO2 electro-reduction utilized in electrolytic aluminum industry
The conversion of CO2 to high valuable chemicals using the renewable energy has attracted much attention in chemical industry.However,owing to the lack of efficient technology,no breakthrough has been achieved.In order to solve above problems,a new membrane electrolytic cell was proposed in this work.In the cell,CO2 can be reduced to CO at cathode and HCl can be oxidized to Cl2 at the anode.The obtained CO and Cl2 can be used to synthesize phosgene.In this way,not only can recycling of HCl waste gas be solved,but also CO2 emission reduction can be realized.In order to improve the efficiency of CO2 electroreduction,three-dimensional flowing Ag/Cu porous modified electrode was fabricated by cyanide-free electroplating method.The current density of the cathode reaction is increased to 46.3 mA/cm2 by expanding the specific surface area of the electrode and increasing the active sites on the electrode surface,the Faraday efficiency of CO generation is stable at 92.52%.This work has a high theoretical value and a promising perspective in storage of electric energy and reducing carbon dioxide emission.
membrane electrolysis cellelectroreduction of CO2recycling of HCl waste gasporous modified electrode
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