A facile chemical reduction approach is adopted for the synthesis of iron tungstate (FeWO₄)/ceria (CeO₂)–decorated reduced graphene oxide (rGO) nanocomposite. Surface morphological studies of rGO/FeWO₄/CeO₂ composite reveal the formation of hierarchical FeWO₄ flower–like microstructures on rGO sheets, in which the CeO₂ nanoparticles are decorated over the FeWO₄ microstructures. The distinct anodic peaks observed for the cyclic voltammograms of studied electrodes under light/dark regimes validate the electroactive proteins present in the microalgae. With the cumulative endeavors of three-dimensional FeWO₄ microstructures, phase effect between rGO sheet and FeWO₄/CeO₂, highly exposed surface area, and light harvesting property of CeO₂ nanoparticles, the relevant rGO/FeWO₄/CeO₂ nanocomposite demonstrates high power and stable biophotovoltaic energy generation compared with those of previous reports. Thus, these findings construct a distinct horizon to tailor a ternary nanocomposite with high electrochemical activity for the construction of cost-efficient and environmentally benign fuel cells.

采用一种简便的化学还原方法来合成钨酸铁（FeWO ₄）/二氧化铈（CeO ₂）装饰的还原型氧化石墨烯（rGO）纳米复合材料。rGO / FeWO ₄ / CeO ₂复合材料的表面形态研究表明，在rGO片层上形成了分层的FeWO ₄花状微结构，其中在FeWO ₄微结构上装饰了CeO ₂纳米颗粒。在明/暗状态下对所研究电极的循环伏安图观察到的明显的阳极峰证实了微藻中存在的电活性蛋白。随着三维FeWO ₄的累积努力rGO / FeWO ₄ / CeO ₂纳米复合材料的微观结构，rGO片与FeWO ₄ / CeO ₂之间的相效应，高暴露的表面积以及CeO ₂纳米颗粒的光收集性能，与之相比，相关的rGO / FeWO ₄ / CeO ₂纳米复合材料显示出高功率和稳定的生物光伏能量产生以前的报告。因此，这些发现为构建具有高电化学活性的三元纳米复合材料提供了广阔的前景，从而可以构建具有成本效益和对环境无害的燃料电池。