Abstract: Disclosed is a carbon dioxide utilization system capable of recharging and undergoing reactions. The system includes a cathode unit provided with a first aqueous solution accommodated in a first accommodation space, and a cathode at least a part of which is submerged in the first aqueous solution; an anode unit provided with an alkaline second aqueous solution accommodated in a second accommodation space, and a metal anode at least a part of which is submerged in the second aqueous solution; and a connection unit provided with a connection channel connecting the first and second accommodation spaces in open communication, and a porous ion transfer member, disposed in the connection channel, for blocking the movement of the first and second aqueous solutions but allowing the movement of ions.

Abstract: Disclosed are a carbon dioxide utilization system capable of producing electricity, hydrogen, and bicarbonate by utilizing carbon dioxide, which is a greenhouse gas, through a spontaneous electrochemical reaction without a separate external power source, and producing magnesium hydrogen carbonate by reacting the hydrogen carbonate ions with magnesium ions generated at an anode.

Abstract: Disclosed is an exhaust gas purification system, including: a cathode unit including a first accommodation space, a first aqueous solution, and a cathode at least partially submerged in the first aqueous solution; an anode unit including a second accommodation space, a second aqueous solution which is basic, and a metal anode at least partially submerged in the second aqueous solution; and a connection unit configured to connect the cathode unit and the anode unit. The anode is made of aluminum (Al) or zinc (Zn), a gas containing nitrogen oxide (NOx) is injected into the first aqueous solution, the nitrogen oxide injected into the first aqueous solution reacts with water to produce nitric acid (HNO3), the nitric acid supplies hydrogen ions, and the hydrogen ions and electrons of the cathode react to produce hydrogen.