The widespread use of fossil fuels has led to the release of significant amounts of carbon dioxide CO2 in the atmosphere, contributing to global warming. One potential solution to address this issue is CO2 electroreduction, a process that converts CO2 into valuable carbon-based products. Furthermore, by harnessing renewable energy sources and utilizing fuels produced through CO2 electroreduction, it is possible to establish a carbon-neutral CO2 cycle. Catalysts are pivotal in this process as they reduce the activation energy barrier of CO2, which is inherently a stable and fully oxidized linear molecule. In this research, we have investigated several types of catalysts for CO2 electrochemical reduction: Cu nanowires supported on Carbon Vulcan and Cu and Ag nanoparticles synthesized through radiolysis on a TiO2 support.