fig4

Figure 4. Pyrocatalytic hydrogen production. (A) Schematic diagram showing the basic principle of pyrocatalytic hydrogen evolution; (B) The energy levels of CdS nanorod catalysts and the HOMO energy level of 2MBI, and (C) pyrocatalytic hydrogen production pathway over the prepared CdS-2MBI sample under cold-hot alternation excitation. Figure B and C are quoted with permission from Zhang et al.^[26]; (D) Schematic diagram of PZT sheet generating pyroelectricity and splitting water into hydrogen. This figure is quoted with permission from Zhang et al.^[27]; (E) Schematic illustration of pyrocatalytic hydrogen generation of Au/BaTiO₃ nanoparticles driven by surface plasmon local heating, and (F) the corresponding normalized H₂ production rates (normalized to the production rate of Au/BaTiO₃ NPs) of different samples under the irradiation by a 532 nm nanosecond laser. Figure E and F are quoted with permission from You et al.^[28]. HOMO: Highest occupied molecular orbital; PZT: PbZrTiO₃.