Figure 15.

(a) Structure of OER4. (b) Photocurrent densities of the OER4@Fe₂O₃ and pristine Fe₂O₃ in the phosphate buffer (pH 7) with a bias of 0.8 V vs NHE, and under AM 1.5 G illumination (100 mW cm^–2). Adapted with permission from ref (189). Copyright 2017 Elsevier. (c) Structures of an OER5 (RuOH₂²⁺). (d) Schematic diagram of the surface structure following reductive electropolymerization of RuOH₂²⁺ on nTiO₂-RuPdvb²⁺. (e) Variation of surface coverage as a function of irradiation time at 475 mW cm^–2 at 455 nm over a 16 h photolysis period in aqueous 0.1 M HClO₄. Adapted with permission from ref (190). Copyright 2014 American Chemical Society.