Electrochemical reaction device and electrochemical reaction method

An electrochemical reaction device comprising:

• an electrolytic tank storing an electrolytic solution containing water;
• a fine bubble supply part including a solution tank storing the electrolytic solution and a fine bubble generating part which supplies fine bubbles containing carbon dioxide into the electrolytic solution stored in the solution tank to dissolve the carbon dioxide in the electrolytic solution, the solution tank being connected to the electrolytic tank so as to supply the electrolytic tank with the electrolytic solution in which the carbon dioxide is dissolved;
• a reduction electrode which is immersed in the electrolytic solution stored in the electrolytic tank and reduces the carbon dioxide to generate a carbon compound;
• an oxidation electrode which is immersed in the electrolytic solution stored in the electrolytic tank and oxidizes the water to generate oxygen;
• and
• a generator connected to the reduction electrode and the oxidation electrode,

An electrochemical reaction method comprising:

• storing an electrolytic solution containing water into an electrolytic tank;
• supplying bubbles containing carbon dioxide into the electrolytic solution, the bubbles having a floating velocity of 10 mm/s or less in the electrolytic solution under an atmospheric pressure and 20° C. condition;
• immersing a reduction electrode and an oxidation electrode in the electrolytic solution;
• and
• supplying electricity to the reduction electrode and the oxidation electrode to generate a carbon compound by reducing the carbon dioxide and to generate oxygen by oxidizing the water.