Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO₂ Particles

High photocatalytic activity of silver-loaded ZnO-SnO2 coupled catalysts

“…In contrast to the coupled semiconductor system, loading noble metals on the surface of semiconductor to trap the charge carriers has been reported as another important method to improve the photocatalytic activity of semiconductor [7,[28][29][30][31][32][33][34][35]. Various noble metal-loaded semiconductor systems, including Ag, Pt, Au/ZnO [7,[28][29][30][31][32], and Ag, Pt, Au/TiO 2 [33][34][35], have been studied.…”

“…Various noble metal-loaded semiconductor systems, including Ag, Pt, Au/ZnO [7,[28][29][30][31][32], and Ag, Pt, Au/TiO 2 [33][34][35], have been studied. The kind, size and amount of noble metal loaded on the surface of semiconductor particles were the major factors that affected the photocatalytic activities of semiconductor [7,29].…”

Role of Water Oxidation Catalyst IrO2 in Shuttling Photogenerated Holes Across TiO2 Interface

“…The semiconductor-assisted water splitting reaction has dominated photocatalytic research for the past few decades. − Although precious metals such as Pt promote the production of hydrogen, − finding a suitable cocatalyst for oxygen generation at the photoanode remains a challenge . Metal oxides such as IrO 2 , , RuO 2 , − and cobalt phosphate , have been shown to promote water oxidation at the semiconductor/electrolyte interface with high turnover rates.…”

Solar Photocatalytic Hydrogen Production: Current Status and Future Challenges

“…Arakawa's group reported in 1992 that the O 2 evolution activity of TiO 2 could be enhanced significantly by the addition of 0.1-2.2 M Na 2 CO 3 to the aqueous catalyst dispersion [27]. Although there were several studies evincing the simultaneous production of H 2 and O 2 in particulate systems, the reproducibility of some of these experiments was found to be poor or the overall STH efficiency was rather low [28,29]. The bandgap energies of TiO 2 modifications as well as the energy levels of some other wide bandgap semiconductor photocatalysts are given in Fig.…”