CO₂ can be a next generation feedstock for electricity-driven bioproduction due to its abundance and availability. Microbial electrosynthesis (MES), a promising technique for CO₂ electroconversion, provides an attractive route for the production of valuable products from CO₂, but issues surrounding efficiency and reasonable productivity should be resolved. Improving the anode performance for water oxidation under neutral pH is one of the most important aspects to advance current MES. Here, we introduce cobalt-phosphate (Co-Pi) assisted water oxidation at the counter electrode (i.e., anode) to upgrade the MES performance at pH 7.0. We show that CO₂ can be converted by photochemoautotrophic bacterium, Rhodobacter sphaeroides into organic acids and carotenoids in the MES reactor. Planktonic cells of R. sphareroides in the Co-Pi anode equipped MES reactor was ca. 1.5-fold higher than in the control condition (w/o Co-Pi). The faradaic efficiency of the Co-Pi anode equipped MES reactor was remarkably higher (58.3%) than that of the bare anode (27.8%). While the system can improve the CO₂ electroconversion nonetheless there are some further optimizations are necessary.

由于 CO 2 的丰富性和可用性， CO ₂可以成为电力驱动的生物生产的下一代原料。微生物电合成 (MES) 是一种很有前景的 CO _{2电转化技术，为从 CO 2}生产有价值的产品提供了一条有吸引力的途径，但围绕效率和合理生产率的问题仍需解决。提高中性 pH 值下水氧化的阳极性能是推进当前 MES 的最重要方面之一。在这里，我们在反电极（即阳极）引入磷酸钴 (Co-Pi) 辅助水氧化，以提升 pH 7.0 时的 MES 性能。我们证明CO ₂可以被光化学自养细菌转化，球状红杆菌在 MES 反应器中转化为有机酸和类胡萝卜素。在配备有 Co-Pi 阳极的 MES 反应器中，球状红球菌的浮游细胞约为 。比对照条件（无 Co-Pi）高 1.5 倍。配备 Co-Pi 阳极的 MES 反应器的法拉第效率 (58.3%) 明显高于裸阳极 (27.8%)。尽管该系统可以改善 CO ₂电转化，但仍有一些进一步的优化是必要的。