Single-Atom Co-Catalysts Employed in Titanium Dioxide Photocatalysis

With a distinct electronic structure and unsaturated coordination centers, supported single-atoms (SAs) have shown great potential in heterogeneous catalysis due to their superior activity, stability, selectivity. Over the last few years, fascination of SA-use spread also over photocatalysis, i.e., particular case which chemical reactions are activated by charge transfer from an illuminated semiconductor. Titanium dioxide (TiO2) is one most studied photocatalytic materials. It widely used as light absorbing semiconductor decorated with metallic (nanoparticles single-atom) co-catalysts. In current review, we emphasize role SAs co-catalyst clearly set it apart use single atoms classic catalysis. The review first briefly describes principal features SAs, gives overview important examples single-atom Then, discuss photocatalysis key co-catalysts on TiO2 photocatalysts applications. At last, provide outlook for further exploring TiO2-based systems.