Research into the electrochemical CO₂ reduction reaction (eCO₂R), a promising process for converting carbon dioxide emissions into useful chemicals, has increased significantly because of the growing demand for sustainable energy solutions worldwide. Depending on the metal catalyst, different reaction products can be derived from carbon dioxide. Production of hydrocarbons, such as methane and ethylene, via eCO2R on Cu- and Fe-based catalysts, is particularly valuable, given the broad market share and value of these chemicals. Thus, this thesis examines the CO2 reduction activity and selectivity of Cu2O, CuO, Fe3O4, and Cu-Fe mixed catalysts on a H-cell reactor to understand the impact of catalyst composition, loading, and applied electrochemical conditions into the formation of hydrocarbons.