Molten salt electrolysis method to achieve Ni/MoS2 with activity sulfur enhance the hydrogen evolution reaction performance under alkaline condition
Molten salt electrolysis method to achieve Ni/MoS2 with activity sulfur enhance the hydrogen evolution reaction performance under alkaline condition
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熔盐电解法制备具有活性硫的Ni/MoS2增强碱性条件下析氢反应性能
DOI：
10.1016/j.surfin.2020.100789
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发表时间：
2020-11
影响因子：
6.2
通讯作者：
Bing Na
中科院分区：
文献类型：
--
作者：
Shuang Zhang;Fang Cheng;Yuhui Liu;Sheng Lin;Shan Lin;Rong Zeng;Qianglin Wei;Lin Sheng Zeng;Yifu Chen;Bing Na
二硫化钼（MoS2）在析氢反应（HER）中应用的主要问题是：难以优化活性位点和促进电荷转移。Ni的修饰可以提高MoS2的内在活性，增加活性位的数量和效率。Ni/MoS2纳米片电极。碳纤维布上的纳米花是通过一种简单的一锅熔盐电解方法设计的。量。熔盐电解过程中掺杂镍的含量是可控的。两种特殊结构的纳米片。并通过纳米花的结构对比来证实其效果。得益于Ni装饰及其独特之处。在碱性溶液（1 M.KOH）中，Ni/MoS2电极表现出优异的电催化性能。结果表明，所设计的Ni/MoS2纳米片电催化剂具有最佳的催化性能。低过电位（109.0 mV，电流密度为10.0毫安厘米2）和小塔菲尔斜率（41.2 mV.dec 1）。电催化析氢试验结果及密度泛函理论（DFT）计算。发现Mo被Ni取代。靠近顶端位置的S被两个掺杂的Ni原子激活吸附H，氢以最低的吸附自由能ΔG∗H （ΔG∗H= 0.13）被吸附在表面。当S原子位于远端时，吸附的自由能增加。这些发现为纳米结构HER催化剂的合成开辟了一条有效且可推广的策略。
The main problem in the application of molybdenum disulfide (MoS2) in hydrogen evolution reaction (HER) is.difficult to optimize the active site and promote the charge transfer. The decoration of Ni can improve the.intrinsic activity and increase the number of active sites of MoS2 efficiency. An electrode of Ni/MoS2 nanosheets.or nanoflowers on carbon fiber cloth is designed via a facile one-pot molten salt electrolysis method. The amount.of doped Ni was controllable during the molten salt electrolysis process. Two specially structures of nanosheets.and nanoflowers were compared to confirm the effect by structure. Benefiting from Ni decoration and its unique.crystal structure, the Ni/MoS2 electrode exhibits excellent electrocatalytic performance in alkaline solution (1 M.KOH). As a result, the designed electrocatalyst of Ni/MoS2 nanosheets shows the best catalytic performance with.low overpotentials (109.0 mV for the current density of 10.0 mA cm 2) and the small Tafel slope (41.2 mV.dec 1). Test results of electrocatalytic hydrogen evolution and density functional theory (DFT) calculation.revealed that Mo was substituted by Ni. S near the top position is activated by two doping Ni atoms to adsorb H..The Hydrogen is adsorbed on the surface with the lowest free energy of adsorption ΔG∗H (ΔG∗ H= 0.13). When the S atom is at the far end, the free energy of adsorption increases. These findings open an effective and propagable strategy for nanostructure HER catalysts synthesis.
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影响因子：
6.2
作者：
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通讯作者：
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影响因子：
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作者：
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