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首页> 外文期刊>RSC Advances >Vanadium doped few-layer ultrathin MoS2 nanosheets on reduced graphene oxide for high-performance hydrogen evolution reaction
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Vanadium doped few-layer ultrathin MoS2 nanosheets on reduced graphene oxide for high-performance hydrogen evolution reaction

机译：钒在还原的氧化石墨烯上掺杂的几层超薄MoS2纳米片用于高性能的析氢反应

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摘要

In this paper, we demonstrate a facile solvothermal synthesis of a vanadium( V ) doped MoS _(2) -rGO nanocomposites for highly efficient electrochemical hydrogen evolution reaction (HER) at room temperature. The surface morphology, crystallinity and elemental composition of the as-synthesized material have been thoroughly analyzed. Its fascinating morphology propelled us to investigate the electrochemical performance towards the HER. The results show that it exhibits excellent catalytic activity with a low onset potential of 153 mV versus reversible hydrogen electrode (RHE), a small Tafel slope of 71 mV dec ~(?1) , and good stability over 1000 cycles under acidic conditions. The polarization curve after the 1000 ~(th) cycle suggests there has been a decrement of less than 5% in current density with a minor change in onset potential. The synergistic effects of V-doping at S site in MoS _(2) NSs leading to multiple active sites and effective electron transport route provided by the conductive rGO contribute to the high activity for the hydrogen evolution reaction. The development of a high-performance catalyst may encourage the effective application of the as-synthesized V-doped MoS _(2) -rGO as a promising electrocatalyst for hydrogen production.
机译：在本文中，我们展示了钒（V）掺杂的MoS _（2）-rGO纳米复合材料的轻松溶剂热合成，可在室温下高效电化学制氢反应（HER）。已对合成后材料的表面形态，结晶度和元素组成进行了全面分析。其令人着迷的形态促使我们研究其对HER的电化学性能。结果表明，与可逆氢电极（RHE）相比，它具有优异的催化活性，低的开始电位153 mV，小的Tafel斜率71 mV dec〜（？1），以及在酸性条件下经过1000次循环后具有良好的稳定性。第1000次循环后的极化曲线表明，电流密度的下降幅度小于5％，而开始电势的变化很小。 MoS _（2）NS中S部位V掺杂的协同效应导致多个活性部位和导电rGO提供的有效电子传输路径有助于氢释放反应的高活性。高性能催化剂的开发可能会鼓励合成后的V掺杂MoS_（2）-rGO作为氢生产的有希望的电催化剂的有效应用。

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