过电位
二硫化钼
钼
醋酸
相(物质)
傅里叶变换红外光谱
材料科学
氢
化学
化学工程
无机化学
分析化学(期刊)
物理化学
有机化学
复合材料
电化学
电极
工程类
作者
Jingdong Li,Kan Li,Qingli Tang,Jianxing Liang,Chenyu Bao,Feng Shi,Maohong Fan,Jinping Jia
出处
期刊:Fuel
[Elsevier]
日期:2023-09-01
卷期号:347: 128428-128428
被引量:7
标识
DOI:10.1016/j.fuel.2023.128428
摘要
The semiconductor phase molybdenum disulfide (2H-MoS2) with poor hydrogen evolution reaction (HER) performance restricts the further improvement of hydrogen production. Herein, an acetic acid coupled structure phase engineering (SPE) strategy is developed to synthesize a homogeneous and orderly cobalt molybdenum composite structure. The resulting CoS2/MoS2 complexes reveal excellent HER activity with a low overpotential of 80, 95, and 135 mV at 10 mA cm−2 in 0.5 M H2SO4, 1 M KOH, and 1 M PBS. Fourier transform infrared spectroscopy (FT-IR) and thermogravimetry mass spectrometry (TGA-MS) results illustrate that acetic acid is successfully coupled at the interface between CoS2 and MoS2. Results from density functional theory demonstrate that the π-π conjunction formed by acetic acid coupling can work as a bridge to help electrons transfer from cobalt to molybdenum. More importantly, the method can be extended to the synthesis of other composite materials with the similar structure.
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