Although MoS2 quantum dots with abundant edge sites have been regarded as promising eletrode materials for the hydrogen evolution reaction (HER), their electrocatalytic capacity still requires improvements in actual applications. Herein. we demonstrate a controllable and robust bottom-up approach to build 3D crosslinked graphene-Ti3C2Tx MXene frameworks decorated with MoS2 quantum dots (MQD/RGO-MX) via a convenient co-assembly process. The novel structural design gives the MQD/RGO-MX nanoarchitectures a series of superior textural attributes, including 3D interconnected networks, continuous meso- and macropores, well-dispersed quantum dots, ameliorative electronic configuration, and excellent electrical conductivity. Accordingly, the resulting hybrid nanoarchitectures express superior electrocatalytic properties in terms of a low onset potential of only 45 mV, a small Tafel slope of 61 mV dec−1 as well as a long service life towards the HER, which make it quite competitive against bare MoS2 quantum dots, MXene as well as binary MQD/RGO and MQD/MXene electrocatalysts.

中文翻译：

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构建用 MoS2 量子点装饰的 3D 交联石墨烯-MXene 纳米结构可实现高效的电催化析氢


尽管具有丰富边缘位点的MoS2量子点被认为是有前途的析氢反应（HER）电极材料，但其电催化能力在实际应用中仍需要改进。在此处。我们展示了一种可控且强大的自下而上方法，通过方便的共组装过程构建用 MoS2 量子点 (MQD/RGO-MX) 装饰的 3D 交联石墨烯-Ti3C2Tx MXene 框架。新颖的结构设计赋予MQD/RGO-MX纳米结构一系列优异的结构属性，包括3D互连网络、连续的介孔和大孔、分散良好的量子点、改善的电子配置和优异的导电性。因此，所得的混合纳米结构表现出优异的电催化性能，起始电位低至 45 mV，塔菲尔斜率小至 61 mV dec−1，并且对 HER 的使用寿命较长，这使其与裸露的纳米结构相比具有相当的竞争力。 MoS2 量子点、MXene 以及二元 MQD/RGO 和 MQD/MXene 电催化剂。