UV-irradiated fluidized bed reactor system and Pt-loaded TiO₂ spheres were developed for photocatalytic water splitting. This novel approach was explored as a means to minimize the parasitic back reaction, mass transport and radiation distribution effects that limit the performance and scalability of immobilized-film and suspended slurry photocatalysts typically employed for photocatalytic hydrogen production. By fluidizing Pt-loaded TiO₂ spheres in a 2.2 M Na₂CO₃ solution, steady hydrogen production rates up to 211 μmol/h with an apparent quantum efficiency of 1.33% were achieved upon UV-irradiation. This demonstrates a marked 44% increase in the apparent quantum efficiency when compared to the performance of a traditional Pt-loaded TiO₂ suspended slurry photocatalyst in the same reactor. It is hypothesized that this enhanced performance is primarily due to improved separation of the evolved H₂ and O₂ from the Pt-loaded photocatalyst particles, thus reducing the parasitic back reaction.

开发了紫外线辐射的流化床反应器系统和负载Pt的TiO ₂球用于光催化水分解。人们探索了这种新颖的方法，以最大程度地减少寄生背反应，传质和辐射分布效应，这些效应限制了通常用于光催化制氢的固定膜和悬浮浆料光催化剂的性能和可扩展性。通过在2.2 M Na ₂ CO ₃中流化负载Pt的TiO ₂球在溶液中，经紫外线照射后，氢的稳定产氢率高达211μmol/ h，表观量子效率为1.33％。与在同一反应器中传统的Pt负载的TiO ₂悬浮浆料光催化剂的性能相比，这表明表观量子效率显着提高了44％。据推测，这种增强的性能主要是由于改善了从负载Pt的光催化剂颗粒中析出的H ₂和O _2的分离，从而减少了寄生反应。