- Nanostructured Catalysts: These catalysts have high surface areas and active sites, enhancing the efficiency of CO2 conversion. - Bimetallic Catalysts: Combining two metals can improve activity and selectivity for CO2 hydrogenation. - Metal-Organic Frameworks (MOFs): MOFs offer tunable porosity and active sites for CO2 adsorption and conversion. - Electrocatalysts: Development of highly efficient electrocatalysts for CO2 reduction to valuable chemicals using renewable electricity.