摘要
Photocatalytic water splitting with separate H2 and O2 evolution is crucial because it eliminates the explosion potential and hydrogen-purification cost. A novel twin reactor was designed to separate the evolution of hydrogen and oxygen in photocatalytic water splitting under visible light. A modified Nafion membrane was employed to segregate the two photocatalysts in the twin reactor so that hydrogen and oxygen can be evolved separately. Conventional Z-scheme catalysts, Pt/SrTiO3:Rh and WO3, were used as hydrogen-photocatalyst and oxygen-photocatalyst, respectively. Fe2+ and Fe3+ were added in the reaction solution as electron-transfer mediator. The ratio of evolved H2 and O2 was in agreement with the stoichiometric ratio (2:1) of hydrogen and oxygen of water. An average hydrogen generation rate of 1.59 μmol/g-h was achieved in the twin-reactor system, which was twice as much as that in the conventional Z-scheme system. The improved H2 yield was due to the prevention of the water-splitting backward reaction in the twin reactor.
原文 | English |
---|---|
頁(從 - 到) | 1523-1529 |
頁數 | 7 |
期刊 | International Journal of Hydrogen Energy |
卷 | 35 |
發行號 | 4 |
DOIs | |
出版狀態 | Published - 2010 2月 |
All Science Journal Classification (ASJC) codes
- 可再生能源、永續發展與環境
- 燃料技術
- 凝聚態物理學
- 能源工程與電力技術