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Improving the Photocatalytic Hydrogen Generation Using Nonaggregated Zinc Phthalocyanines
ACS Applied Energy Materials ( IF 6.4 ) Pub Date : 2021-09-14 , DOI: 10.1021/acsaem.1c02102
Eminegül Genc Acar 1 , A. Celil Yüzer 2 , Gülbin Kurtay 3 , Gizem Yanalak 4 , Ersan Harputlu 2 , Emre Aslan 4 , Kasim Ocakoglu 2 , Mustafa Güllü 3 , Mine Ince 2 , Imren Hatay Patir 5
Affiliation  

In comparison to traditional solar cells, the dye-sensitized photocatalytic system is one of the most appealing artificial photosynthesis mechanisms due to its low cost and straightforward fabrication. Herein, the photoelectrochemical and photocatalytic hydrogen evolution reactions of Zn-based phthalocyanine (Pc) derivatives, abbreviated as ZnPc-1 and ZnPc-2, were primarily studied in the presence of TEOA sacrificial electron donor. To this aim, the PC activities of ZnPc-1/TiO2 and ZnPc-2/TiO2 photocatalysts were investigated in the absence and presence of a cocatalyst. For the first hour, the amount of hydrogen generated by ZnPc derivatives (ZnPc-1/TiO2 and ZnPc-2/TiO2) was determined to be 1.221 and 0.864 mmol g–1 h–1, respectively. Additionally, the solar-to-hydrogen conversion efficiencies of ZnPc-1/TiO2 and ZnPc-2/TiO2 were ascertained to be 3.15% and 2.22%, respectively. Interestingly, STH efficiencies of photocatalysts were increased about 4-fold in the presence of a cocatalyst. Consequently, to elucidate the structural properties of ZnPc-1 and ZnPc-2, density functional theory (DFT) and time-dependent DFT studies were also conducted, and it was discovered that noncovalent interactions and steric hindrance effects on ZnPc-2 are tightly related to the experimentally determined PC activity differences between ZnPc-1 and ZnPc-2.

中文翻译:

使用非聚集锌酞菁改善光催化制氢

与传统太阳能电池相比,染料敏化光催化系统由于其低成本和简单的制造而成为最具吸引力的人工光合作用机制之一。在此,主要研究了在 TEOA 牺牲电子供体存在下,锌基酞菁 (Pc) 衍生物(缩写为 ZnPc-1 和 ZnPc-2)的光电化学和光催化析氢反应。为此,研究了在助催化剂不存在和存在下ZnPc-1/TiO 2和 ZnPc-2/TiO 2光催化剂的 PC 活性。在第一个小时,ZnPc 衍生物(ZnPc-1/TiO 2和 ZnPc-2/TiO 2)产生的氢气量确定为 1.221 和 0.864 mmol g –1h –1分别。此外,ZnPc-1/TiO 2和ZnPc-2/TiO 2的太阳能-氢转化效率分别为3.15%和2.22%。有趣的是,在助催化剂的存在下,光催化剂的 STH 效率提高了约 4 倍。因此,为了阐明 ZnPc-1 和 ZnPc-2 的结构特性,还进行了密度泛函理论 (DFT) 和瞬态 DFT 研究,发现非共价相互作用和对 ZnPc-2 的位阻效应密切相关ZnPc-1 和 ZnPc-2 之间通过实验确定的 PC 活性差异。
更新日期:2021-09-27
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