In the present energetic scenario, the world primary energy supply is mainly provided by fossil fuels. As a consequence, the global increasing energy demand causes an increase in carbon dioxide concentration in the atmosphere, that boosts the greenhouse effect. Electrochemical CO2 reduction represents a way to mitigate this effect since it converts this pollutant into value-added products, such as methane, methanol, formic acid, etc… which otherwise are derived from fossil resources. In this thesis work, developed in the laboratories of the Italian Institute of Technology (Center for Sustainable Future Technology@PoliTo), SnO2 is proposed as catalyst for the CO2 electroreduction, since it is an environmentally friendly and inexpensive material.