Figure 7.

(a) Schematic representation of photocatalytic H₂ production by CdS–CaI complexes. CdS and CaI are drawn to scale, while MPA molecules are enlarged by about five-fold. (b) Energy level diagram for H₂ generation. Photoexcited electrons transfer to CaI, while the holes are scavenged by ascorbate (AA). The competing electron–hole recombination pathways are denoted as k_CdS. (c) H₂ generation rate, expressed as a TOF, has a linear dependence on 405 nm photon flux. (d) Total H₂ generated over time (solid line) and the corresponding relative CaI activity values (triangles). The data illustrates enzyme deactivation during H₂ production. Adapted with permission from Ref. [38]. Copyright 2012, ACS.