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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。
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.
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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