Fig. 10. Effect of (A) ligands protection and (B) cluster size on the rates of photocatalytic activity for water splitting studied using Au_n/BaLa₄Ti₄O₁₅ (n = 10–39) and Au NPs/BaLa₄Ti₄O₁₅. (C) TEM image. (D) High resolution-TEM image. (E) Rates of photocatalytic activity for water splitting of Au₂₅–Cr_xO_y/BaLa₄Ti₄O₁₅. Panels (a) and (b) are reproduced with permission from ref. 60. Copyright 2015 American Chemical Society. Panels (c)–(e) are reproduced with permission from ref. 61. Copyright 2018 American Chemical Society.