| abstract |
The present invention provides an electrochemical reaction device capable of stably operating over a long period of time while suppressing a reduction in the amount of CO 2 reduction product produced over time. An electrochemical reaction device according to an embodiment includes a first storage portion that stores a first electrolytic solution containing carbon dioxide, and a second storage that stores a second electrolytic solution containing water. Reaction tank 13 provided with storage part 13B, reduction electrode 11 disposed in first storage part 13A, oxidation electrode 12 disposed in second storage part 13B, and potential using reduction electrode 11 as a working electrode A counter electrode for sweeping, electrically connected to the reduction electrode 11 and the oxidation electrode 12, and electrically connected to a first power source 70 that causes a reduction reaction and an oxidation reaction, and the reduction electrode 11 and the counter electrode; And a second power supply 80 for sweeping the potential with the potential equal to or lower than the oxidation potential of the reduction electrode 11 as the upper limit potential. [Selection] Figure 1 |