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首页> 外文期刊>RSC Advances >Monolayer MoS2 quantum dots as catalysts for efficient hydrogen evolution
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Monolayer MoS2 quantum dots as catalysts for efficient hydrogen evolution

机译：单层MoS2量子点作为高效氢释放的催化剂

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摘要

Monolayer MoS2 quantum dots (QDs) with lateral size around 3 nm were prepared through an effective multi-exfoliation based on lithium (Li) intercalation. The effects of the number of exfoliation on the microstructures and electrocatalytic activities of hydrogen evolution reaction (HER) for MoS2 nanosheets were examined. The lateral size of the nanosheets decreases rapidly with increasing the number of exfoliation. The obtained monolayer MoS2 QDs exhibit improved HER catalytic activities with a low overpotential of approximately 120 mV and a relatively small Tafel slope of 69 mV dec(-1). Both the ultrathin structure and the abundance of exposed active edge sites make monolayer MoS2 QDs a promising HER electrocatalyst for practical application.
机译：通过基于锂（Li）插层的有效多次剥离制备了横向尺寸约为3 nm的单层MoS2量子点（QD）。考察了剥落次数对MoS2纳米片的氢析出反应（HER）的微观结构和电催化活性的影响。纳米片的横向尺寸随着剥落次数的增加而迅速减小。获得的单层MoS2 QDs表现出改善的HER催化活性，具有约120 mV的低过电势和69 mV dec（-1）的相对较小的Tafel斜率。超薄结构和暴露的活性边缘位点的丰富性使单层MoS2 QDs成为实际应用中很有希望的HER电催化剂。

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