Abstract

Transition metal dichalcogenides are one category of potential hydrogen evolution catalyst. Their metallic (1T) structure possesses peculiar optoelectrical properties and so excellent catalytic activity for hydrogen evolution. Here we report a facile modified hydrothermal approach assembling 1T-WSe₂ nanosheets and their hybrids with reduced graphene oxide (RGO). The assembled WSe₂ nanosheets and the hybrids all showed 1T structures. Moreover, incorporating RGO and doping Sn cation resulted in an efficient interface-induced effect and higher electrical transfer performance and so beneficial properties for hydrogen evolution catalysis. Thus, the RGO/1T-WSe₂: Sn nanosheet hybrids showed very high activity and stability for hydrogen evolution catalysis. This work suggests highly efficient and low-cost processes to obtain promising hybrid materials for highly efficient hydrogen evolution catalysis and other photoelectrical applications.

中文翻译：

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1T-WSe 2：Sn纳米片/石墨烯的改良水热法制水

摘要

过渡金属二卤化物是一类潜在的析氢催化剂。它们的金属（1T）结构具有特殊的光电性能，因此对于析氢具有出色的催化活性。在这里，我们报告了一种组装1T-WSe ₂纳米片及其与还原型氧化石墨烯（RGO）的混合体的简便的改进水热方法。组装的WSe ₂纳米片和杂化物均显示1T结构。而且，掺入RGO和掺杂Sn阳离子导致有效的界面诱导效应和更高的电传递性能，并且因此对于氢析出催化是有益的。因此，RGO / 1T-WSe ₂：Sn纳米片杂化物显示出极高的活性和稳定性，可用于氢气析出催化。这项工作提出了一种高效且低成本的方法，以获得有希望的杂化材料，用于高效的氢气析出催化和其他光电应用。