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用于可扩展太阳能燃料生产的浮动钙钛矿-BiVO4器件
作者:小柯机器人 发布时间:2022/8/21 20:14:43

英国剑桥大学Reisner, Erwin团队开发了用于可扩展太阳能燃料生产的浮动钙钛矿-BiVO4器件。相关研究成果于2022年8月17日发表在《自然》。

光电化学(PEC)人造树叶通过将采光和催化集成在一个紧凑的设备中,具有降低可持续太阳能燃料生产成本的潜力。然而,目前的沉积技术限制了它们的可扩展性,而易碎和笨重的散装材料会影响它们的运输和部署。

该文中,研究人员展示了通过使用薄的柔性基底和碳质保护层制造轻质人造树叶。在镀有氧化铟锡的聚对苯二甲酸乙二酯上沉积的卤化铅钙钛矿光电阴极使用铂催化剂时,其活性为4266μmol H2g-1h-1,而在较低(0.1sun)辐照下,使用分子Co助催化剂还原CO2的光电阴极的Co:H2选择性高达7.2。相应的轻质钙钛矿-BiVO4 PEC器件无辅助太阳能-燃料效率分别为0.58%(H2)和0.053%(CO)。其可扩展性的潜力由100cm2的独立人工树叶证明,其性能和稳定性(约24小时)与1.7cm2的同类树叶相当。

在运行过程中形成的气泡进一步使30–100mgcm-2的装置能够漂浮,而轻质反应器有助于在河流上进行室外试验期间收集气体。这种叶子状的PEC装置填补了传统太阳能燃料方法之间的重量鸿沟,展示了与光催化悬浮液和植物叶子相比的每克活性。所提出的轻型浮动系统可实现开放水域应用,从而避免与土地使用的竞争。

附:英文原文

Title: Floating perovskite-BiVO4 devices for scalable solar fuel production

Author: Andrei, Virgil, Ucoski, Geani M., Pornrungroj, Chanon, Uswachoke, Chawit, Wang, Qian, Achilleos, Demetra S., Kasap, Hatice, Sokol, Katarzyna P., Jagt, Robert A., Lu, Haijiao, Lawson, Takashi, Wagner, Andreas, Pike, Sebastian D., Wright, Dominic S., Hoye, Robert L. Z., MacManus-Driscoll, Judith L., Joyce, Hannah J., Friend, Richard H., Reisner, Erwin

Issue&Volume: 2022-08-17

Abstract: Photoelectrochemical (PEC) artificial leaves hold the potential to lower the costs of sustainable solar fuel production by integrating light harvesting and catalysis within one compact device. However, current deposition techniques limit their scalability1, whereas fragile and heavy bulk materials can affect their transport and deployment. Here we demonstrate the fabrication of lightweight artificial leaves by employing thin, flexible substrates and carbonaceous protection layers. Lead halide perovskite photocathodes deposited onto indium tin oxide-coated polyethylene terephthalate achieved an activity of 4,266μmolH2g1h1 using a platinum catalyst, whereas photocathodes with a molecular Co catalyst for CO2 reduction attained a high CO:H2 selectivity of 7.2 under lower (0.1sun) irradiation. The corresponding lightweight perovskite-BiVO4 PEC devices showed unassisted solar-to-fuel efficiencies of 0.58% (H2) and 0.053% (CO), respectively. Their potential for scalability is demonstrated by 100cm2 stand-alone artificial leaves, which sustained a comparable performance and stability (of approximately 24h) to their 1.7cm2 counterparts. Bubbles formed under operation further enabled 30–100mgcm2 devices to float, while lightweight reactors facilitated gas collection during outdoor testing on a river. This leaf-like PEC device bridges the gulf in weight between traditional solar fuel approaches, showcasing activities per gram comparable to those of photocatalytic suspensions and plant leaves. The presented lightweight, floating systems may enable open-water applications, thus avoiding competition with land use.

DOI: 10.1038/s41586-022-04978-6

Source: https://www.nature.com/articles/s41586-022-04978-6

期刊信息

Nature:《自然》,创刊于1869年。隶属于施普林格·自然出版集团,最新IF:42.778
官方网址:http://www.nature.com/