A Particulate Photocatalyst Water-Splitting Panel for Large-Scale Solar Hydrogen Generation
A Particulate Photocatalyst Water-Splitting Panel for Large-Scale Solar Hydrogen Generation
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DOI：
10.1016/j.joule.2017.12.009
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发表时间：
2018-03-21
期刊：
影响因子：
39.8
通讯作者：
Domen, Kazunari
中科院分区：
文献类型：
--
作者：
Goto, Yosuke;Hisatomi, Takashi;Domen, Kazunari
太阳光驱动的光催化水分解已被研究作为一种潜在的可扩展的和经济可行的生产可再生氢的手段。然而，适合于大规模有效水分解和迅速收集气态产物的反应器尚未得到证实。在此，我们展示了一个太阳能驱动的水裂解反应器使用固定化铝掺杂的SrTiO3光催化剂，并解决了反应器设计中的关键问题，与放大。一个面板反应器填充只有1毫米深的水层能够快速释放产品气泡没有强制对流。一个平板反应器与1米（2）的光接收面积保留了光催化剂的固有活性，并实现了0.4%的太阳能转化为氢的能量转换效率通过水裂解在自然阳光照射。易于扩展的水分解板的概念是大规模生产低成本可再生太阳能氢的可行手段。
Sunlight-driven photocatalytic water splitting has been investigated as a potentially scalable and economically feasible means of producing renewable hydrogen. However, reactors suitable for efficient water splitting and prompt collection of gaseous products on a large scale have yet to be demonstrated. Here, we demonstrate a sunlight-powered water-splitting reactor using a fixed Al-doped SrTiO3 photocatalyst and address the key issues in the reactor design associated with the scale-up. A panel reactor filled with only a 1-mm-deep layer of water was capable of rapid release of product gas bubbles without forced convection. A flat panel reactor with 1 m(2) of light-accepting area retained the intrinsic activity of the photocatalyst and achieved a solar-to-hydrogen energy conversion efficiency of 0.4% by water splitting under natural sunlight irradiation. The concept of a readily extensible water-splitting panel is a viable means for large-scale production of low-cost renewable solar hydrogen.