Ti-oxo clusters as photocatalytic heterojunction precursor materials are a promising strategy for preparing TiO. Enhancing the utilization of photogenerated electrons and increasing the delivery channel of these electrons can improve the performance of photocatalytic materials for H evolution significantly. Hereby, a novel ternary [TiO-CdS QDs-5/Co(bpy)Cl] photocatalyst for highly efficient photocatalytic HER was reported for the first time. In this paper, a TiO-CdS QDs-5 binary Z-type heterojunction was identified, and the photocatalytic HER yield was further improved by [Co(bpy)Cl]. The above-mentioned ternary system is advantageous for separating and transferring photogenerated electron-hole pairs. The photocatalytic HER rate of this catalytic system was 4440.84 μmol·h·g, which was 7.1 times more than that of TiO-CdS QDs-5. The results indicate that the system is capable of maintaining stability and enhancement of the photocatalytic HER under visible light irradiation. In this study, we investigated photogenerated electron transfer pathways to improve the photocatalytic HER of TiO and we also revealed the electron transfer mechanism of TiO-CdS QDs-5 Z-typed heterojunction with [Co(bpy)Cl] through DFT calculation. More importantly, this study presents a novel Z-type heterojunction catalyst, which enhance the electron transport path and this work provides an effective design concept for the development of TiO-based materials for efficient photocatalytic HER.

中文翻译：

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钴基配合物修饰 CdS-TiO2 Z 型异质结中的电子转移路径以促进可见光光催化析氢


Ti-oxo簇作为光催化异质结前驱体材料是制备TiO的一种有前途的策略。提高光生电子的利用率并增加这些电子的传递通道可以显着提高光催化材料的析氢性能。据此，首次报道了一种用于高效光催化HER的新型三元[TiO-CdS QDs-5/Co(bpy)Cl]光催化剂。本文鉴定了TiO-CdS QDs-5二元Z型异质结，并通过[Co(bpy)Cl]进一步提高了光催化HER产率。上述三元体系有利于光生电子空穴对的分离和转移。该催化体系的光催化HER速率为4440.84 μmol·h·g，是TiO-CdS QDs-5的7.1倍。结果表明，该系统能够在可见光照射下保持稳定性并增强光催化HER。在本研究中，我们研究了光生电子转移途径以提高TiO的光催化HER，并通过DFT计算揭示了TiO-CdS QDs-5 Z型异质结与[Co(bpy)Cl]的电子转移机制。更重要的是，这项研究提出了一种新型Z型异质结催化剂，它增强了电子传输路径，这项工作为开发用于高效光催化HER的TiO基材料提供了有效的设计理念。