The efficient production of acetate from HCO₃- is demonstrated in a photo-assisted microbial electrosynthesis system (MES) incorporating a WO₃/MoO₃/g-C₃N₄ heterojunction photo-assisted biocathode supporting Serratia marcescens Q1 electrotroph. The WO₃/MoO₃/g-C₃N₄ structured electrode consisting of a layer of g-C₃N₄ coated on graphite felt decorated with W/Mo oxides nanoparticles exhibited stable photocurrents, 4.8 times higher than the g-C₃N₄ electrode and acetate production of 3.12 ± 0.20 mM/d with a CE_acetate of 73 ± 4% and current of 2.5 ± 0.3 A/m². Photo-induced electrons on the conduction bands of WO₃/MoO₃/g-C₃N₄ favoured hydrogen evolution, which was metabolized by S. marcescens with HCO₃- to acetate, while the holes were refilled by the electrons travelling from the anode. Such mechanism reduced the interfacial resistances creating a supplementary driving force leading to higher acetate production. The biocompatible components of WO₃/MoO₃/g-C₃N₄ synergistically couple light-harvesting and further catalyze S. marcescens to acetate from HCO₃-, providing a feasible strategy for achieving sustainable high rates of acetate production.

在结合了WO ₃ / MoO ₃ / gC ₃ N ₄异质结光辅助生物阴极，支持粘质沙雷氏菌Q1的电子辅助的光辅助微生物电合成系统（MES）中，证明了从HCO _3-高效生产乙酸盐的能力。WO ₃ / MoO ₃ / gC ₃ N ₄结构的电极，由涂覆有W / Mo氧化物纳米粒子装饰的石墨毡上的gC ₃ N ₄层组成，显示出稳定的光电流，比gC ₃ N ₄高4.8倍电极和醋酸盐产量为3.12±0.20 mM / d，CE_醋酸盐为73±4％，电流为2.5±0.3 A / m ²。WO ₃ / MoO ₃ / gC ₃ N ₄的导带上的光生电子促进了氢的逸出，氢被S. marcescens与HCO _3-代谢为乙酸，而空穴被从阳极传播的电子重新充满。这种机制降低了界面阻力，从而产生了补充的驱动力，从而导致更高的乙酸酯产量。WO ₃ / MoO ₃ / gC ₃ N ₄的生物相容性成分协同作用使采光协同作用，并进一步将粘菌链霉菌从HCO ₃催化成乙酸盐，为实现可持续的高乙酸盐生产速度提供了可行的策略。