Figure 18.

Chemical structures of (a) OER9 (Mn₄O₄). (b) Charge transfer route. (c) Photocurrent response of the corresponding photoanode. Representative data from conductive FTO coated glass (black), OER9⁺-Nafion/TiO₂ (gray), Nafion/photosensitizer-TiO₂ (red), and OER9⁺-Nafion/photosensitizer-TiO₂ (blue), illuminated at 100 mW/cm² through a series of long-pass light filters as labeled. Adapted from ref (200). Copyright 2010 American Chemical Society. (d) OER10 (Mn porphyrin; Ar = 4-tBuC₆H₄, 2,4,6-Me₃C₆H₂, or C₆F₅). Adapted with permission from ref (109). Copyright 2012 Wiley-VCH. (e) OER11 (Co₄O₄). Adapted with permission from ref (202). Copyright 2017 Royal Society of Chemistry.