塔菲尔方程
纳米片
剥脱关节
二硫化钨
过渡金属
材料科学
透射电子显微镜
电化学
超声
催化作用
金属
化学工程
纳米技术
电极
石墨烯
化学
物理化学
冶金
有机化学
工程类
作者
Thang Phan Nguyen,Seokhoon Choi,Jong‐Myeong Jeon,Ki Chang Kwon,Ho Won Jang,Soo Young Kim
标识
DOI:10.1021/acs.jpcc.5b12164
摘要
Two-dimensional transition metal disulfide (TMD) nanosheets, including MoS2, WS2, TaS2, and TiS2, were used to catalyze the hydrogen evolution reaction (HER). The TMDs were exfoliated by sonication to generate nanosheet layers that were approximately a few hundred nanometers in size. X-ray diffraction and transmission electron microscope data indicated that the major plane of the exfoliated nanosheets was the (002) plane and that the hexagonal structure is maintained after exfoliation with lattice constants of 0.32 nm for MoS2 and WS2 and 0.34 nm for TaS2 and TiS2. Exfoliated MoS2, WS2, TaS2, and TiS2 loaded on Au electrodes exhibited good electrocatalytic activity with low onset potentials of ∼100, 150, 175, and 135 mV, respectively, at a current density of −1 mA/cm2. MoS2 and TiS2 exhibited the best HER performance with Tafel slopes of 94.91 and 91 mV/decade. These results indicated that TMD nanosheets have potential applications as HER catalysts for the mass production of hydrogen.
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