塔菲尔方程
催化作用
拉曼光谱
电化学
钒
材料科学
化学工程
扫描电子显微镜
透射电子显微镜
二硫化钼
制氢
纳米技术
化学
物理化学
电极
有机化学
冶金
复合材料
光学
工程类
物理
作者
G. Mohan Kumar,P. Ilanchezhiyan,Hak Dong Cho,Dong Jin Lee,Deuk Young Kim,Tae Won Kang
摘要
Recently, two-dimensional (2D) metal chalcogenides are gaining considerable attention for its potential employment in energy storage, catalysis, electronic, and sensing devices. Vanadium disulfide (VS2) from the 2D family gathers intensive attention for its application as promising electrocatalysts in hydrogen evolution reaction (HER). Here, we present a simple, cost-effective hydrothermal technique for the synthesis of nanodiscs (NDs)-like VS2 structures. They were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) and evaluated as electrochemical catalysts in hydrogen evolution reaction (HER). NDs-like structures made up of thin nanoplates with active sites were found to play a huge role on their electrochemical properties. The prepared VS2 NDs show highly efficient electro catalytic performances with a Tafel slope of 79 mV dec−1. In addition, the prepared VS2 NDs exhibited high stability in acidic solution without any sign for degradation even after 500 continuous potential cycles. The excellent HER performance and long-term durability suggest the VS2 NDs to serve as an promising and inexpensive HER electro catalyst.
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