Song Zhimin, Hisatomi Takashi, Chen Shanshan, Wang Qian, Ma Guijun, Li Shikuo, Zhu Xiaodi, Sun Song, Domen Kazunari
School of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui, 230601, P.R. China.
Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
ChemSusChem. 2019 May 8;12(9):1906-1910. doi: 10.1002/cssc.201802306. Epub 2019 Jan 28.
La Ti Cu Ag S O (x=0-1) is a type of long-wavelength-responsive oxysulfide photocatalysts for hydrogen evolution and has been demonstrated to enable the Z-scheme water-splitting coupling with oxygen evolution photocatalysts (OEPs) in the particulate sheet. Among La Ti Cu Ag S O materials, La Ti AgS O was found to have the highest performance on Z-scheme overall water splitting in conjunction with PtO -WO as an OEP and a triiodide/iodide (I /I ) redox couple as a shuttle electron mediator in a powder-suspension system. Loading Pt/NiS on La Ti AgS O benefitted the Z-scheme to achieve an apparent quantum yield of 0.12 % at 420 nm. The results for this powder-suspension system differ from earlier studies on photocatalyst sheet configurations, in which p-type doping and the formation of a solid solution could effectively enhance the water-splitting activity. This work not only demonstrates a La Ti AgS O -based Z-scheme water-splitting photocatalyst but also improves the understanding of the difference between particulate sheets and a powder-suspension system available in an optimal strategy for water splitting.
La₂Ti₂Cu₂Ag₂S₃Oₓ（x = 0 - 1）是一种用于析氢的长波长响应型氧硫化物光催化剂，并且已被证明能够在颗粒片层中实现与析氧光催化剂（OEP）的Z型水分解耦合。在La₂Ti₂Cu₂Ag₂S₃O材料中，发现La₂Ti₂Ag₂SO₄与作为OEP的PtO₂-WO₃以及作为穿梭电子介质的三碘化物/碘化物（I₃⁻/I⁻）氧化还原对相结合时，在Z型全水分解方面具有最高性能。在La₂Ti₂Ag₂SO₄上负载Pt/NiS有利于Z型结构在420 nm处实现0.12%的表观量子产率。该粉末悬浮体系的结果与早期关于光催化剂片层结构的研究不同，在早期研究中，p型掺杂和固溶体的形成可以有效提高水分解活性。这项工作不仅展示了一种基于La₂Ti₂Ag₂SO₄的Z型水分解光催化剂，还增进了对颗粒片层和粉末悬浮体系之间差异的理解，这对于水分解的最佳策略具有重要意义。
