Figure : The Tandem Electrolyzer concept coupling a CO2 to CO electrolyzer ("cell 1") directly to a CO to C2+ electrolyzer ("cell 2") to close the CO2 cycle using value-added C1-C3 products. Efficient CO2 use is enabled by a Tandem Electrolysis Cell concept powered by renewables to produce chemicals and fuels. The Tandem Cell concept offers maximal materials and operational flexibility for Cell 1 and Cell 2. In cell 1, the captured CO2 will be converted to high purity CO-rich feeds that enter cell 2 for the electrochemical C-C coupling.