Mo₂C-based materials are expected to be extraordinary electrocatalysts for hydrogen evolution reaction (HER) due to their unique Pt-like electronic structures. However, the strong interaction between Mo and H as well as the scarce active centers impede their further applications. Herein, a facile and controllable route via Zn doping is proposed to weaken the H adsorption energy of Mo and create more active centers to boost the HER kinetics. A series of hierarchical branched MoC/Mo₂C catalysts with promoted HER kinetics are constructed and well controlled by Zn-doping, where the structural transformation from Mo₂C to MoC give rise to the optimized electronic structure and attenuate H adsorption energy. Besides, all Zn and Mo sites in Zn-MoC/Mo₂C catalyst can be activated, and thereby dramatically increase the number of active centers as well as enhance the intrinsic catalytic activity. As expected, the Zn-MoC/Mo₂C catalyst exhibits extremely low overpotential and Tafel slopes with excellent durability in both alkaline and acidic solutions. This work highlights a feasible strategy for enhancing hydrogen generation by dopant induced structural transformation and might provide an avenue for low-cost, efficient, and multifunctional electrocatalysts.

由于其独特的类 Pt 电子结构， Mo ₂ C 基材料有望成为析氢反应 (HER) 的非凡电催化剂。然而，Mo和H之间的强相互作用以及稀少的活性中心阻碍了它们的进一步应用。在此，本文提出了一种通过Zn掺杂的简便且可控的途径，以削弱Mo的H吸附能并产生更多的活性中心以提高HER动力学。通过Zn掺杂构建并良好控制了一系列具有促进HER动力学的分级支化MoC/Mo _{2 C催化剂，其中从Mo 2} C到MoC的结构转变产生了优化的电子结构并减弱了H吸附能。_{此外，Zn-MoC/Mo 2}中的所有 Zn 和 Mo 位点C催化剂可以被活化，从而显着增加活性中心的数量并增强内在催化活性。正如预期的那样，Zn-MoC/Mo ₂ C 催化剂在碱性和酸性溶液中都表现出极低的过电位和 Tafel 斜率，具有出色的耐久性。这项工作强调了一种通过掺杂剂诱导的结构转变来增强氢气产生的可行策略，并可能为低成本、高效和多功能的电催化剂提供途径。