CO2 conversion CO2 decomposition CO2 hydrogenation CO2 methanation CO2 reduction CO2 utilization CO2-Fischer-Tropsch (CO2-FT) CO2-H2O photo-co-processing Environmental science, engineering & technology Fischer-Tropsch synthesis History of engineering & technology Ni-xSi/ZrO2 SAPO-34 Si promotion SrFeO3−x Technology: general issues VIS-light driven reactions bifunctional composite catalysts biomass carbon allotropes carbon dioxide carbon dioxide electrolysis carbon nano-onions carbon nanofibers carbon nanotubes carbon-TiO2 carbon-supported iron catalyst catalyst catalyst deactivation climate change