The design and development of inexpensive highly efficient electrocatalystsfor hydrogen production, underpins several emerging clean-energy technologies.In this work, for the first time, molybdenum disulfide (MoS2) nanodots havebeen synthesized by ionic liquid assisted grinding exfoliation of bulkplatelets and isolated by sequential centrifugation. The nanodots have athickness of up to 7 layers (4 nm) and an average lateral size smaller than 20nm. Detailed structural characterization established that the nanodots retainedthe crystalline quality and low oxidation states of the bulk material. Thesmall lateral size and reduced number of layers provided these nanodots with aneasier path for the electron transport and plentiful active sites for thecatalysis of hydrogen evolution reaction (HER) in acidic electrolyte. The MoS2nanodots exhibited good durability and a Tafel slope of 61 mVdec-1 with anestimated onset potential of -0.09 V vs RHE, which are considered among thebest values achieved for 2H phase. It is envisaged that this work may provide asimplistic route to synthesize a wide range of 2D layered nanodots that haveapplications in water splitting and other energy related technologies.KEYWORDS: MoS2 nanosheets, hydrogen evolution reaction, electrocatalysis,edges, nanodots, ionic liquid exfoliation, water splitting
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机译：廉价高效的制氢电催化剂的设计和开发为几种新兴的清洁能源技术提供了支持。在这项工作中，首次通过离子液体辅助的大块血小板磨削剥落合成了二硫化钼（MoS2）纳米点，并通过顺序离心进行了分离。 。纳米点的厚度高达7层（4纳米），平均横向尺寸小于20纳米。详细的结构表征确定了纳米点保留了块状材料的晶体质量和低氧化态。较小的横向尺寸和减少的层数为这些纳米点提供了用于电子传输的退火路径，以及用于在酸性电解质中催化氢释放反应（HER）的大量活性位点。 MoS2纳米齿具有良好的耐久性，Tafel斜率为61 mVdec-1，估计的起始电势为-0.09 V vs. RHE，被认为是2H相获得的最佳值。可以预期，这项工作可能为合成广泛的二维层状纳米点提供了简单的途径，这些二维点状纳米点在水分解和其他与能源有关的技术中都有应用。关键词：MoS2纳米片，氢析出反应，电催化，边缘，纳米点，离子液体剥落，水分裂
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