Figure 15.

a) Schematic of photocatalytic CO₂ reduction on nanostructured TiO₂ films deposited with Pt cocatalyst particles of varying sizes. Different alignments between TiO₂ band structure and Pt work function is suggested to be responsible for the observed different photocatalytic activities. Reproduced with permission.211 Copyright 2012, American Chemical Society. b) High‐resolution TEM image of an Au−Cu nanoparticle deposited on the TiO₂ surface as the cocatalyst for selectively reducing CO₂ to CH₄. Reproduced with permission.212 Copyright 2014. American Chemical Society. c) Schematic showing the M. thermoacetica–CdS hybrid system for the photosynthetic conversion of CO₂ to acetic acid. Reproduced with permission.213 Copyright 2016, American Association for the Advancement of Science.