Z-Scheme Water Splitting under Near-Ambient Pressure using a Zirconium Oxide Coating on Printable Photocatalyst Sheets.,ChemSusChem

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Z-Scheme Water Splitting under Near-Ambient Pressure using a Zirconium Oxide Coating on Printable Photocatalyst Sheets.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-07-22 , DOI: 10.1002/cssc.202001706
Sayuri Okunaka _{1,

2,

3} , Hiroyuki Kameshige _{1,

2} , Takeshi Ikeda _{1,

2} , Hiromasa Tokudome _{1,

2} , Takashi Hisatomi ₄ , Taro Yamada ₅ , Kazunari Domen _{4,

5}

Affiliation

Sunlight‐driven water splitting systems operating under ambient pressure are essential for practical renewable hydrogen production. Printable photocatalyst sheets, composed of a hydrogen evolution photocatalyst (HEP), an oxygen evolution photocatalyst (OEP), and conductive metal nanoparticles, are cost‐effective and scalable systems. However, the decrease in water splitting activity under ambient pressure due to reverse reactions hampers their practical application. In this study, coating zirconium oxide (ZrO_x) by facile drop‐casting onto a printed photocatalyst sheet, which consists of SrTiO₃ : Rh, BiVO₄ : Mo, and Au nanocolloids as the HEP, OEP, and electron mediator, respectively, effectively maintains the water splitting activity at elevated pressure. The ZrO_x‐coated photocatalyst sheet retains 90 % and 84 % of the base performance (the pristine sheet at 10 kPa) at 50 and 90 kPa, respectively. Achieving efficient water splitting at the ambient pressure by inexpensive and extensible processes is an important step toward solar hydrogen production.

中文翻译：

在可印刷光催化剂片材上使用氧化锆涂层在近环境压力下进行Z方案水分解。

在环境压力下运行的阳光驱动的水分解系统对于实际生产可再生氢至关重要。由氢气析出光催化剂（HEP），氧气析出光催化剂（OEP）和导电金属纳米颗粒组成的可印刷光催化剂片是经济高效且可扩展的系统。但是，由于逆反应，在环境压力下水分解活性的降低妨碍了它们的实际应用。在这项研究中，通过简便的滴铸法将氧化锆（ZrO _x）涂覆到由SrTiO ₃ ：Rh，BiVO ₄组成的印刷光催化剂板上。：Mo和Au纳米胶体分别作为HEP，OEP和电子介体，可有效保持高压下的水分解活性。ZrO _x涂层的光催化剂片在50和90 kPa时分别保留90％和84％的基本性能（原始片在10 kPa时）。通过廉价且可扩展的方法在环境压力下实现有效的水分解是迈向太阳能制氢的重要一步。

更新日期：2020-09-24

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