Single atom catalysts (SACs) are considered the ultimate form of catalysts. The behavior of SACs is generally directed by the coordination environment and the nature of the support. Indeed, supports with tunable coordination sites offer opportunities to stabilize individual atoms. Although the field of single atom catalysis has become an intense topic, practical applications in industrial processes are still lacking due to several bottlenecks such as their synthesis, stability and integration in a continuous catalytic reactor. With DESTINY, I propose a different approach by designing SACs on a ceramic support rationally designed by an additive manufacturing process. The ceramic support will confer high stability while the use of stereolithography 3D printing (SLA) will allow the preparation of supports with complex morphology to optimize the flow and interactions of reactants with individual atomic sites. The first objective will be to design light-sensitive inorganic precursors to stabilize single atoms after ceramization. The second objective will be to explore the behavior of 3D printed SACs for the hydrogenation of CO2 to ethanol and C2+ alcohols used as model reactions. My investigations will combine catalytic tests and advanced characterization techniques - especially in operando - in order to elucidate the correlation between the coordination of metal atoms in the ceramics and the reaction performance. The final objective will be to realize a 3D printed flow reactor based on ceramic supported SACs for the hydrogenation of CO2 to ethanol. The combination of the highly stable ceramic support and coordination site control through rational precursor design with the specific 3D architecture will enable high selectivity and CO2 conversion rate. DESTINY will be the first demonstration of 3D printing of SACs and will be a paradigm in process engineering, which will find practical applications for CO2 utilization.