MoS₂ have been regarded as promising catalysts for the hydrogen evolution reaction (HER). However, its poor catalytic performance in neutral and alkaline solution would be problematic for the practical application. Combining semiconductors with metals as Mott-Schottky heterojunctions (MSH) has been regarded as an effective way to improve catalytic activity. Herein, a pH-universal adaptability Mo-MoS₂ MSH has been constructed via an in-situ lithiation method. The constructed MSH structure can effectively optimize the sulfur sites’ electronic structure with interfacial electron redistribution and enhance the proton adsorption property under all pH conditions. To achieve the current density of 10 mA cm⁻², it only needs overpotentials of 91, 138 and 128 mV in 0.5 M H₂SO₄, 1.0 M KOH and 1.0 M PBS, respectively, which has been one of the best values of current noble-metal-free electrocatalyst. This work can pave a valuable approach for the design high activity HER electrocatalysts for pH-universal with Pt-like activity.

MoS ₂被认为是用于析氢反应（HER）的有前途的催化剂。然而，其在中性和碱性溶液中的催化性能较差，在实际应用中存在问题。将半导体与金属结合为莫特-肖特基异质结（MSH）被认为是提高催化活性的有效方法。在此，通过原位锂化方法构建了一种pH通用适应性Mo-MoS _{2 MSH。}所构建的MSH结构可以通过界面电子再分布有效优化硫位点的电子结构，增强所有pH条件下的质子吸附性能。达到10 mA cm ^{-2的电流密度}_{，在 0.5 M H 2} SO ₄ 、1.0 M KOH 和 1.0 M PBS 中分别只需要 91、138 和 128 mV 的过电势，这是目前无贵金属电催化剂的最佳值之一。这项工作可以为设计具有类 Pt 活性的 pH 通用型高活性 HER 电催化剂提供有价值的方法。