ACS Nano. 2014 Aug 26;8(8):8468-76. doi: 10.1021/nn503027k.
Owing to the excellent potential for fundamental research and technical applications in optoelectronic devices and catalytic activity for hydrogen evolution reaction (HER), transition metal dichalcogenides have recently attracted much attention. Transition metal sulfide nanostructures have been reported and demonstrated promising application in transistors and photodetectors. However, the growth of transition metal selenide nanostructures and their applications has still been a challenge. In this work, we successfully synthesized high-quality WSe2 nanotubes on carbon fibers via selenization. More importantly, through optimizing the growth conditions, ternary WS2(1–x)Se2x nanotubes were synthesized and the composition of S and Se can be systematically controlled. The as-grown WS2(1–x)Se2x nanotubes on carbon fibers, assembled as a working electrode, revealing low overpotential, high exchange current density, and small series resistance, exhibit excellent electrocatalytic properties for hydrogen evolution reaction. Our study provides the experimental groundwork for the synthesis of low-dimensional transition metal dichalcogenides and may open up exciting opportunities for their application in electronics, photoelectronics, and catalytic electrochemical reactions.
由于在光电设备和析氢反应（HER）的催化活性方面具有优异的基础研究和技术应用潜力，过渡金属二硫属化物最近引起了广泛关注。已经报道了过渡金属硫化物纳米结构，并在晶体管和光电探测器中展示了有前景的应用。然而，过渡金属硒化物纳米结构的生长及其应用仍然是一个挑战。在这项工作中，我们通过硒化成功地在碳纤维上合成了高质量的 WSe2 纳米管。更重要的是，通过优化生长条件，合成了三元 WS2(1–x)Se2x 纳米管，并且可以系统地控制 S 和 Se 的组成。在碳纤维上生长的 WS2(1–x)Se2x 纳米管组装成工作电极，表现出低过电势、高交换电流密度和小串联电阻，对析氢反应表现出优异的电催化性能。我们的研究为低维过渡金属二硫属化物的合成提供了实验基础，并可能为它们在电子学、光电子学和催化电化学反应中的应用开辟令人兴奋的机会。
