The number of exposed active sites in a catalyst plays a key role in determining its catalytic performance. However, the aggregation effect in nanostructured catalysts causes much less reactive sites exposed. In this paper, we report a novel structure of WSe₂/rGO with highly exposed WSe₂ active edge sites by uniformly imbedding the rGO between each WSe₂ nanosheets. With the introduction of rGO, the electron transport property of the WSe₂/rGO hybrid structure has also been enhanced. The structure and composition of the samples were investigated by the X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. Our electrochemical characterizations confirm that the WSe₂/rGO hybrid structure exhibits enhanced electrochemical catalytic performance with a Tafel slop of 85 mV/dec for HER, much smaller than that of the pure WSe₂.

催化剂中暴露的活性位点的数量在决定其催化性能方面起着关键作用。然而，纳米结构催化剂中的聚集效应导致暴露的活性位点少得多。在本文中，我们通过将rGO均匀地嵌入每个WSe ₂纳米片之间，报道了一种具有高度暴露的WSe ₂活性边缘位点的WSe ₂ / rGO新型结构。随着rGO的引入，WSe ₂ / rGO杂化结构的电子传输性能也得到了增强。通过X射线衍射，X射线光电子能谱，扫描电子显微镜和透射电子显微镜研究样品的结构和组成。我们的电化学特性证实了WSe₂ / rGO杂化结构表现出增强的电化学催化性能，对HER的Tafel斜率为85 mV / dec，远小于纯WSe _2的Tafel斜率。