Solar-driven hydrogen generation using single-semiconductor photocatalysts for hydrogen evolution seems to be challenging due to their poor solar to fuel conversion efficiency because of their fast charge carrier recombination. The ternary heterostructure was prepared by an advanced approach to suppress the recombination of photogenerated charge carriers and has contributed a new platform for designing highly efficient photocatalytic systems. Herein, we fabricated a ternary heterojunction with ultrathin WS₂–SnS₂ nanosheets and CdS nanorods, and the photocatalytic activity was studied. The optimized CdS/SnS₂–WS₂ (6 wt%) nanostructures were found to be highly stable and exhibited the highest hydrogen evolution rate of 232.45 mmol g⁻¹ h⁻¹, which was almost 93-fold higher than that of the pristine CdS nanorods. Also, Density Functional Theory (DFT) calculations confirmed that the favorable band alignment for charge transport and superior catalytic activity of the newly fabricated ternary nanostructures make them a potential candidate for solar-driven hydrogen production.

中文翻译：

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通过桥接三元异质结调节载流子传输速率以实现 CdS 纳米棒的太阳能驱动氢析出

使用单半导体光催化剂进行氢析出的太阳能驱动氢气发电似乎具有挑战性，因为它们的电荷载流子复合速度较快，因此太阳能到燃料的转换效率很差。三元异质结构是通过抑制光生载流子复合的先进方法制备的，为设计高效光催化系统提供了新平台。在此，我们制备了具有超薄 WS ₂ -SnS ₂纳米片和 CdS 纳米棒的三元异质结，并研究了其光催化活性。发现优化的 CdS/SnS ₂ –WS ₂ (6 wt%) 纳米结构高度稳定，并表现出最高的析氢速率 232.45 mmol g^-1 h ^-1，几乎是原始 CdS 纳米棒的 93 倍。此外，密度泛函理论 (DFT) 计算证实，新制造的三元纳米结构对电荷传输有利的带排列和优异的催化活性使其成为太阳能驱动制氢的潜在候选者。