کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
62333 | 47634 | 2008 | 5 صفحه PDF | دانلود رایگان |
Co-catalysts loaded on SrTiO3:Rh in visible-light-driven Z-scheme photocatalysis systems consisting of SrTiO3:Rh for H2 evolution, BiVO4 for O2 evolution, and Fe3+/Fe2+ for an electron mediator were investigated. The activity of the system using a Ru co-catalyst for overall water splitting was as high as that of the system using a Pt co-catalyst. The photocatalytic activity of the system using the Pt co-catalyst decreased as the partial pressures of evolved H2 and O2 were increased. In contrast, such deactivation was not observed for the system using the Ru co-catalyst. The investigation of the back-reactions revealed that water formation from H2 and O2, reduction of Fe3+ by H2, and oxidation of Fe2+ by O2 were significantly suppressed in the system using the Ru co-catalyst, resulting in good photocatalytic performance for water splitting. The (Ru/SrTiO3:Rh)–(BiVO4)–(Fe3+/Fe2+) photocatalysis system gave a quantum yield of 0.3% and a stable activity more than 70 h. This system was confirmed to be active for water splitting using a solar simulator.
Journal: Journal of Catalysis - Volume 259, Issue 1, 1 October 2008, Pages 133–137