\WS2\ nanosheets based on liquid exfoliation as effective electrocatalysts for hydrogen evolution reaction
By Guan-Qun Han and Yan-Ru Liu and Wen-Hui Hu and Bin Dong and Xiao Li and Yong-Ming Chai and Yun-Qi Liu and Chen-Guang Liu
Published in Materials Chemistry and Physics
NULL
2015
Abstract
\WS2\ nanosheets (WS2 NSs) as electrocatalysts for hydrogen evolution reaction (HER) have been prepared based on liquid exfoliation in dimethyl-formamide (DMF) via a direct dispersion and ultrasonication method. X-ray diffraction (XRD) shows the decreasing crystalline of the exfoliated \WS2\ (E-WS2). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that the as prepared E-WS2 consists of a few two-dimensional nanosheets, with large wrinkles on the surface. Electrochemical measurements show an excellent activity and stability of the E-WS2, with a low overpotential of 80
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