Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-gu Gwangju, 500-712, South Korea.
Photochem Photobiol Sci. 2010 Mar;9(3):349-56. doi: 10.1039/b9pp00097f. Epub 2010 Feb 1.
Bio-hydrogen production in light-assisted microbial electrolysis cell (MEC) with a dye sensitized solar cell (DSSC) was optimized by connecting multiple MECs to a single dye (N719) sensitized solar cell (V(OC) approx. 0.7 V). Hydrogen production occurred simultaneously in all the connected MECs when the solar cell was irradiated with light. The amount of hydrogen produced in each MEC depends on the activity of the microbial catalyst on their anode. Substrate (acetate) to hydrogen conversion efficiencies ranging from 42% to 65% were obtained from the reactors during the experiment. A moderate light intensity of 430 W m(-2) was sufficient for hydrogen production in the coupled MEC-DSSC. A higher light intensity of 915 W m(-2), as well as an increase in substrate concentration, did not show any improvement in the current density due to limitation caused by the rate of microbial oxidation on the anode. A significant reduction in the surface area of the connected DSSC only showed a slight effect on current density in the coupled MEC-DSSC system when irradiated with light.
在带有染料敏化太阳能电池（DSSC）的光辅助微生物电解池（MEC）中进行生物制氢，通过将多个 MEC 连接到单个染料（N719）敏化太阳能电池（开路电压约为 0.7 V）来进行优化。当太阳能电池受到光照时，所有连接的 MEC 中都会同时发生制氢反应。每个 MEC 中产生的氢气量取决于阳极上微生物催化剂的活性。在实验过程中，从反应器中获得了 42%至 65%的从底物（乙酸盐）到氢气的转换效率。在耦合的 MEC-DSSC 中，430 W m(-2) 的适度光强足以进行氢气生产。更高的光强 915 W m(-2) 以及底物浓度的增加，由于阳极上微生物氧化的速率限制，并没有导致电流密度的任何提高。当用光照射时，连接的 DSSC 的表面积显著减少，仅对耦合的 MEC-DSSC 系统中的电流密度产生轻微影响。
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