Abstract: A process for producing solid carbon and gaseous oxygen from CO2 via electrolysis using an electrolysis apparatus is disclosed. The apparatus includes a chamber with an electrolyte inlet, an electrolyte outlet, a liquid electrolyte containing CO2 in the chamber, at least one cathode-anode pair, with the cathode including a liquid metal capable of catalysing reduction of CO2 to solid carbon at a selected operating temperature of the process. The process includes causing the electrolyte to flow from the inlet to the outlet in fluid communication with the cathode-anode pair, applying a voltage between the cathode-anode pair and causing solid carbon to form on the cathode from CO2 in the electrolyte and gaseous oxygen to be evolved at the anode from CO2 in the electrolyte.