Hong Hyeonaug, Lee Jang Mee, Yun JaeHyoung, Kim Yong Jae, Kim Seon Il, Shin HyeIn, Ahn Hyun S, Hwang Seong-Ju, Ryu WonHyoung
Department of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea.
Global Innovative Center for Advanced Nanomaterials (GICAN), School of Engineering, Faculty of Engineering and Built Environment, The University of Newcastle, Callaghan, NSW 2308, Australia.
Sci Adv. 2021 May 12;7(20). doi: 10.1126/sciadv.abf2543. Print 2021 May.
The harvesting of photosynthetic electrons (PEs) directly from photosynthetic complexes has been demonstrated over the past decade. However, their limited efficiency and stability have hampered further practical development. For example, despite its importance, the interfacial electron transfer between the photosynthetic apparatus and the electrode has received little attention. In this study, we modified electrodes with RuO nanosheets to enhance the extraction of PEs from thylakoids, and the PE transfer was promoted by proton adsorption and surface polarity characteristics. The adsorbed protons maintained the potential of an electrode more positive, and the surface polarity enhanced thylakoid attachment to the electrode in addition to promoting ensemble docking between the redox species and the electrode. The RuO bioanode exhibited a five times larger current density and a four times larger power density than the Au bioanode. Last, the electric calculators were successfully powered by photosynthetic energy using a RuO bioanode.
在过去十年中，已经证明了直接从光合复合物中收获光合电子（PEs）。然而，它们有限的效率和稳定性阻碍了进一步的实际发展。例如，尽管其重要性，但光合装置与电极之间的界面电子转移却很少受到关注。在本研究中，我们用RuO纳米片修饰电极，以增强从类囊体中提取PEs，并且通过质子吸附和表面极性特征促进了PE转移。吸附的质子使电极电位保持更正，并且表面极性除了促进氧化还原物种与电极之间的整体对接之外，还增强了类囊体与电极的附着。RuO生物阳极的电流密度比Au生物阳极大五倍，功率密度大四倍。最后，使用RuO生物阳极成功地利用光合能量为电子计算器供电。
