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本文报道了在Rh_2O_3/CdS微粒悬浮体系中脂肪醇水溶液可见光催化脱氢的研究结果。实验表明:脂肪醇的脱氢是在水参与下的氧化脱氢反应,产氢速度不仅与醇的碳数有关,且强烈地依赖于溶液的pH值;醇的氧化反应明显地抑制了CdS的光腐蚀,提高了催化剂的操作稳定性,如Rh_2O_3/CdS/EtOH-H_2O体系经100小时的连续光照反应,催化剂活性未见有下降。文中对反应机理也进行了初步讨论。
This paper reports the results of visible-light photocatalytic dehydrogenation of fatty alcohol in Rh_2O_3 / CdS microparticle suspension system. The experimental results show that the dehydrogenation of fatty alcohol is the oxidative dehydrogenation reaction with water. The hydrogen production rate is not only related to the carbon number of the alcohol, but also depends strongly on the pH value of the solution. The alcohol oxidation obviously inhibits the CdS Photo-corrosion, improve the stability of the operation of the catalyst, such as Rh_2O_3 / CdS / EtOH-H_2O system after 100 hours of continuous light reaction, no decrease in catalyst activity. The reaction mechanism is also discussed in this paper.