The ultrathin MoS₂ nanosheets-coated N, P dual-doped hollow carbon nanospheres ([email protected]₂) have been synthesized through a facile template sacrificial method to prepare P-promoted enlarged hollow carbon spheres with followed solvothermal process. P doping in NC can not only tune the electron configuration but also promote formation of hollow nanospheres with larger voids compared with NC. The key to producing carbon spheres with larger voids can be ascribed to the rapid oxidation of P species at high temperature, which provides a strong driving force for the outward diffusion of P. Through optimizing the amount of Mo source, the as-prepared [email protected]₂ with medium amount of Mo source have demonstrated outstanding hydrogen evolution performance with a small overpotential of 178 mV at a current density of 10 mA cm⁻² and maintain stable in acidic solution. This superior performance is attributed to the unique nanostructures with N, P dual-doped conductive carbon spheres with highly hollow degree as core and well-dispersed MoS₂ nanosheets as shell. Therefore, this work suggests that choosing carbon matrix with large surface area as support is the key to synthesizing MoS₂-based electrocatalysts with enhanced HER activity.

通过一种简便的模板牺牲方法，合成了超薄MoS ₂纳米片包覆的N，P双掺杂空心碳纳米球（[email protected] ₂），然后采用溶剂热法制备了P促进的空心碳纳米球。与NC相比，NC中的P掺杂不仅可以调节电子构型，而且可以促进形成具有更大空隙的空心纳米球。产生具有较大空隙的碳球的关键可归因于高温下P物质的快速氧化，这为P的向外扩散提供了强大的驱动力。保护] ₂具有中等量Mo源的样品在10 mA cm ^-2的电流密度下具有178 mV的小的过电势，具有出色的析氢性能，并在酸性溶液中保持稳定。优异的性能归因于N，P双掺杂导电碳球具有独特的纳米结构，其中高空心度为核，而分散良好的MoS ₂纳米片为壳。因此，这项工作表明选择具有大表面积的碳基质作为载体是合成具有增强的HER活性的基于MoS ₂的电催化剂的关键。