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云师大化工学院李如春在《Journal of Colloid and Interface Scienc》发表最新研究成果

已有 551 次阅读 2024-5-25 18:17 |个人分类:云师大研究|系统分类:论文交流

       2024年5月24日,Elsevier 旗下top期刊《Journal of Colloid and Interface Science》在线发表了云南师范大学化学与化工学院高端引进人才李如春博士、大理大学药学院 Kezhen Qi合作的最新研究成果《Manipulating heterointerface to boost formation and desorption of intermediates for highly efficient alkaline hydrogen evolution》。云南师范大学化学化工学院李如春博士为第一作者兼通讯作者,大理大学药学院 Kezhen Qi和Jinli Yu博士为共同通讯作者。

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Abstract

Promoting water dissociation and H intermediate desorption play a pivotal role in achieving highly efficient hydrogen evolution reaction (HER) in alkaline media but remain a great challenge. Herein, we rationally develop a unique W-doped NiSx/Ni material with heterointerface as a favorable HER electrocatalyst which was directly grown on the Cu nanowire foam substrate (W-NiSx/Ni@Cu) by the electrodeposition strategy. Benefiting from the rational design of the interfaces, the electronic coupling of the W-NiSx/Ni@Cu can be efficiently modulated to lower the HER kinetic barrier. The obtained W-NiSx/Ni@Cu exhibits an enhanced HER activity with a low overpotential of 38mV at 10 mA cm−2 and a small Tafel value of 27.5 mV dec−1, and high stability during HER catalysis. In addition, in-situ Raman spectra reveal that the Ni2+ active sites preferentially adsorb OH intermediate. The theoretical calculation confirms that the water dissociation is accelerated by the construction of W-NiSx/Ni heterointerface and H intermediate desorption can be also promoted by H spillover from S active sites in W-NiSx to Ni active sites in metal Ni. This work offers a valuable reference for rational designing heterointerface of electrocatalysts and provides an available method to accelerate the HER kinetics for the ampere-level current density under low overpotential.

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扩展阅读:

云师大化工学院李如春在《Separation and Purification Technology》发表最新研究成果

云师大化工学院李如春博士在top期刊《Chinese Chemical Letters》发表最新研究成果

中山大学博士、武汉理工大学博士后李如春副教授加盟云南师范大学



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