Working electrode, electrochemical cell, and manufacturing method of working electrode

An electrochemical cell comprising:

• a working electrode that includes a substrate and a CO2 adsorbent supported by the substrate;
• a counter electrode;
• and
• an electrolyte that covers the working electrode and the counter electrode, wherein
• the CO2 adsorbent is configured to bind to CO2 contained in a CO2-containing gas in response to an application of a voltage between the counter electrode and the working electrode, which causes electrons to be supplied from the counter electrode to the CO2 adsorbent,
• the substrate is made of a non-carbon material,
• the CO2 adsorbent is made of an inorganic material,
• the working electrode is substantially free of carbon, and
• the electrolyte is an ionic liquid.

A manufacturing method of a working electrode that includes a substrate and a CO2 adsorbent supported by the substrate, wherein

• the CO2 adsorbent is configured to bind to CO2 contained in a CO2-containing gas in response to an application of a voltage between a counter electrode and the working electrode, which causes electrons to be supplied from the counter electrode to the CO2 adsorbent,
• the substrate is made of a non-carbon material,
• the CO2 adsorbent is made of an inorganic material, and
• the working electrode is substantially free of carbon,
• the manufacturing method comprising precipitating the CO2 adsorbent on a surface of the substrate in a polyol solution by a polyol reduction reaction.