过电位
塔菲尔方程
材料科学
交换电流密度
催化作用
锡
纳米技术
化学工程
电化学
电极
冶金
化学
物理化学
有机化学
工程类
作者
Guangbo Liu,Yunfeng Qiu,Zhiguo Wang,Jia Zhang,Xiaoshuang Chen,Mingjin Dai,Dechang Jia,Yu Zhang,Zhonghua Li,PingAn Hu
标识
DOI:10.1021/acsami.7b11413
摘要
The electrocatalytic hydrogen evolution reaction (HER) has attracted increasing attention in the field of hydrogen-based economy, whereat developing cheap and efficient catalysts to reduce the use of Pt-based catalysts is highly required. Tin disulfide (SnS2) as a new rising star has exhibited intriguing properties in energy storage and conversion applications, while showing slow progress in HER due to the inherent poor activity. Herein, we demonstrate the successful structural engineering and simultaneous integration of trace amount Pt in SnS2 nanosheets via a facile and effective in situ cycling voltammetry activation process, leading to the efficiently synergistic HER. Defect-rich SnS2 nanosheets decorated with a trace amount (0.37 wt %) of Pt exhibit greatly enhanced HER activity due to the synergy between them, revealing low onset potential of 32 mV and overpotential of 117 mV at 10 mA/cm2, small Tafel slope of 69 mV/dec, and large exchange current density of 394.46 μA/cm2. Present work provides an intriguing strategy for developing ultralow loading Pt electrocatalysts with high HER performance.
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