School of Chemistry and Environment, Beihang University, 37 Xueyuan Road, Beijing, PR China.
Bioresour Technol. 2011 Dec;102(23):10881-5. doi: 10.1016/j.biortech.2011.09.028. Epub 2011 Sep 14.
Reducing the inner resistances is crucial for the enhancement of hydrogen generation in microbial electrolysis cells (MECs). This study demonstrates that the optimization of the anode arrangement is an effective strategy to reduce the system resistances. By changing the normal MEC configuration into a stacking mode, namely separately placing the contacted anodes from one side to both sides of cathode in parallel, the solution, biofilm and polarization resistances of MECs were greatly reduced, which was also confirmed with electrochemical impedance spectroscopy analysis. After the anode arrangement optimization, the current and hydrogen production rate (HPR) of MEC could be enhanced by 72% and 118%, reaching 621.3±20.6 A/m3 and 5.56 m3/m3 d respectively, under 0.8 V applied voltage. A maximum current density of 1355 A/m3 with a HPR of 10.88 m3/m3 d can be achieved with 1.5 V applied voltage.
降低内阻对于提高微生物电解池（MEC）的产氢效率至关重要。本研究表明，优化阳极排列是降低系统内阻的有效策略。通过将常规 MEC 构型改为堆叠模式，即将接触阳极从一侧分别放置到阴极两侧并平行排列，可以显著降低 MEC 的溶液、生物膜和极化内阻，这也通过电化学阻抗谱分析得到了证实。经过阳极排列优化后，在 0.8 V 施加电压下，MEC 的电流和产氢速率（HPR）可分别提高 72%和 118%，达到 621.3±20.6 A/m3和 5.56 m3/m3 d。在 1.5 V 施加电压下，可实现 1355 A/m3 的最大电流密度和 10.88 m3/m3 d 的 HPR。
