基于水溶性多金属氧酸盐的光催化燃料电池

Water Soluble Polyoxometalate-based Photocatalytic Fuel Cell

以水溶性多金属氧酸盐作为光催化剂和电子载体构建了一种新型光催化燃料电池.该光催化燃料电池发生燃料的均相光催化降解反应,可实现在无光照情况下的持续放电.使用生物柴油副产物甘油作为燃料时,该光催化燃料电池的输出功率达0.24 m W/cm^2.在持续光照条件下,电池可长时间运转近50 h,电流稳定在0.75 m A/cm^2以上.甘油在电池中可持续循环放电,根据实际的反应程度可被转化为醛和酸,进一步氧化得到COx.对多种有机燃料的应用表明该光催化燃料电池具有广泛的适用性.

A novel photocatalytic fuel ceU using water soluble polyoxometalates （POM） as photocatalyst and charge carrier was built. The fuel oxidation in this study is a homogeneous decomposition reaction that occurred in electrolyte solution and the cell could generate electricity in dark. Using bio-glycerols as fuels, the power density of the photocatalytic fuel cell could reach 0. 24 mW/cm^2. The cell worked steadily for nearly 50 h with current above 0. 75 mA under continuous irradiation. Theoretically, the glycerol fuel can be either partially converted to aldehydes and acids, or fully converted to COS, depending on the degree of the oxidization reactions. Ultimately, this novel photoactivated hybrid fuel cell could expand fuel supply and utilization.