The photoelectron transfer between semiconductors and cells is the rate-determining step that controls the solar H₂ production of whole-cell inorganic-biohybrid systems (IBSs). Herein, we constructed an IBS by using reduced graphene oxide (RGO) to integrate Shewanella oneidensis MR-1 (SW) cells and Cu₂O, which exhibited a 11–38-fold enhancement of photocatalytic H₂ production compared with RGO-free IBSs (Cu₂O/SW and Cu₂O/organic electron mediator/SW). Further analysis revealed that RGO provided multifunctional contributions to H₂ production from IBS, that is, sufficient area for IBS supporting, efficient photoelectron collection from Cu₂O, and effective electron distribution into the cells. This study offers opportunities for rationally designing electron transfer pathways to achieve high-performance IBSs.

中文翻译：

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氧化石墨烯还原的全细胞无机生物混合系统，可提高太阳能的产氢量

半导体与电池之间的光电子转移是控制整个电池无机生物混合系统（IBSs）产生太阳能H ₂的速率确定步骤。在这里，我们通过使用还原性氧化石墨烯（RGO）整合了Shewanella oneidensis MR-1（SW）细胞和Cu ₂ O来构建了IBS，与不含RGO的IBS相比，其展现出11到38倍的光催化H ₂产生（Cu ₂ O / SW和Cu ₂ O /有机电子介体/ SW）。进一步的分析表明，RGO为IBS的H ₂产生提供了多种功能，即有足够的IBS支撑区域，有效地从Cu _2中收集了光电子。O，并将有效电子分配到细胞中。这项研究为合理设计电子转移途径以实现高性能IBS提供了机会。