In the last decade, many initiatives have been undertaken by governments, companies and other institutions to reduce the output and concentration of CO2 in the atmosphere. The current non-emitting energy sources with highest potential are solar and wind energy. Unfortunately, these energy sources vary in power production, while the demand fluctuates far less. Hence, a solution is needed for crossing the times when there is a mismatch in energy supply and demand. One potential solution is to store excess energy in chemical bonds by using electrochemical CO2 reduction.