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Low-temperature molten salt synthesis of MoS2@CoS2 heterostructures for efficient hydrogen evolution reaction.
Chemical Communications ( IF 4.3 ) Pub Date : 2020-05-21 , DOI: 10.1039/d0cc01726d
Song He 1 , Hongfang Du 1 , Ke Wang 1 , Qianchi Liu 1 , Jinmeng Sun 1 , Yuhang Liu 1 , Zhuzhu Du 1 , Linghai Xie 2 , Wei Ai 1 , Wei Huang 3
Affiliation  

A versatile low-temperature molten salt approach has been developed for fabricating a MoS2@CoS2 heterostructure electrocatalyst, where low-cost molten KSCN serves as both the reaction medium and sulfur source. The as-obtained electrocatalyst with a defect-rich structure is highly efficient for the hydrogen evolution reaction (HER), delivering a low overpotential of 96 mV at an HER current density of 10 mA cm-2, a small Tafel slope of 60 mV dec-1, and outstanding durability. Density functional theory (DFT) calculations suggest that the heterostructures present an optimized Gibbs free energy of hydrogen adsorption (ΔGH*) close to zero, which is responsible for the excellent HER performance.

中文翻译:

MoS2 @ CoS2异质结构的低温熔融盐合成用于有效的氢气释放反应。

已经开发了一种通用的低温熔融盐方法来制造MoS2 @ CoS2异质结构电催化剂,其中低成本的熔融KSCN既是反应介质又是硫源。如此获得的具有富缺陷结构的电催化剂对于氢气析出反应(HER)非常高效,在HER电流密度为10 mA cm-2时,低过电位为96 mV,Tafel斜率为dec 60 mV。 -1,且出色的耐久性。密度泛函理论(DFT)计算表明,异质结构提供了接近零的最佳氢吸附Gibbs自由能(ΔGH*),这是HER性能优异的原因。
更新日期:2020-04-01
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