Provided is an electrochemical cell comprising a working electrode and a counter electrode. The working electrode comprises an electrode base material, a CO2 adsorbent, and a binder. Application of a voltage between the working electrode and the counter electrode causes electrons to be supplied from the counter electrode to the working electrode, and enables the CO2 adsorbent to bind to CO2 as electrons are supplied. The binder has electrical conductivity, and the CO2 adsorbent is held in the electrode base material by the binder.