Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371, Singapore.
Department of Inorganic Chemistry, University of Chemistry and Technology Prague , Technicka 5, 166 28, Prague 6, Czech Republic.
ACS Appl Mater Interfaces. 2017 Aug 9;9(31):26350-26356. doi: 10.1021/acsami.7b06898. Epub 2017 Jul 28.
Metallic 1T-WS has various interesting properties such as increased density of catalytically active sites on both the basal planes and edges as well as metallic conductivity which allows it to be used in applications such as biosensing and energy devices. Hence, it is highly beneficial to develop a simple, efficient, and low-cost synthesis method of 1T-WS nanosheets from commercially available bulk 2H-WS. In this study, we reported WS nanosheets synthesized directly from bulk WS via solution-based electrochemical exfoliation with bipolar electrodes and investigated their electrocatalytic performances toward hydrogen evolution and oxygen reduction reactions. We successfully synthesized WS nanosheets of regular hexagonal symmetry with a 2H → 1T phase transition. This represents a novel method of producing 1T-WS nanosheets from bulk 2H-WS without compromising on its electrocatalytic properties.
金属 1T-WS 具有多种有趣的性质，例如在基面和边缘上增加催化活性位点的密度以及金属导电性，这使其可用于生物传感和能源设备等应用。因此，开发一种简单、高效、低成本的从商业上可获得的块状 2H-WS 合成 1T-WS 纳米片的方法是非常有益的。在这项研究中，我们报告了通过使用双极电极的基于溶液的电化学剥离直接从块状 WS 合成 WS 纳米片，并研究了它们在析氢和氧还原反应中的电催化性能。我们成功地合成了具有规则六边形对称性的 WS 纳米片，实现了 2H→1T 相转变。这代表了一种在不影响其电催化性能的情况下从块状 2H-WS 生产 1T-WS 纳米片的新方法。
