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在Pt/TiO_2上进行光催化分解水制取氢气和其他光-化学转换的研究已引起人们浓厚的兴趣.据Bard的微电池模型,由于产物氢、氧处于同一反应空间容易发生重合,致使量子效率很低.为了提高光能的利用率,近几年来,曾试验加入第二组分来提高氧化还原产物的产量.如果所加入的组分能与光生氧物种迅速反应,那么既可得到有用的氧化产物,又能阻止氢氧逆反应而同时获得氢燃料.Sakata等考察了醇和水混合体系的光催化反应,发现放氢效率有较大提高,同时在溶液中检知有少量有机氧化物等中间物生成,但是最终光氧化产物则是CO_2.Kawai等和St.John等分别在RuO_2/TiO_2/Pt,Pt/
The research on the photocatalytic decomposition of water on Pt / TiO 2 to produce hydrogen and other light-to-chemical conversion has drawn great interest.According to Bard’s micro-cell model, due to hydrogen and oxygen in the same reaction space prone to overlap, resulting in quantum In order to increase the utilization of light energy, it has been experimentally tried to add the second component in recent years to increase the yield of the redox product, which can be useful if the added component can react rapidly with the photo-oxygen species Of the oxidation products, but also to prevent the reverse reaction of hydrogen and hydrogen fuel at the same time.Sakata et al investigated the mixed system of alcohol and water photocatalytic reaction and found that the hydrogen desorption efficiency is greatly improved, while detecting a small amount of organic oxide solution, etc. Intermediate, but the final photooxidation product is CO_2.Kawai et al. And St. John et al., Respectively, on RuO 2 / TiO 2 / Pt, Pt /