Ru is considered as highly efficient Pt-free catalyst in hydrogen evolution reaction (HER) due to its fast water dissociation kinetics. However, its strong affinity to OH* and H* greatly limits its HER performance. Herein, Ru nanoparticles (NPs) anchored on the mixed substrates of MoS₂ (different 1T contents) and carbon fiber paper (Ru@MoS₂-1T%/CFP) is designed and synthesized with three kinds of interfaces (MoS₂/CFP, Ru/CFP, and Ru/MoS₂) as excellent electrocatalyst for HER. Particularly, the Ru₂@MoS₂-85%/CFP presents superb HER performance with overpotential of 19 mV at 10 mA cm⁻², a low Tafel slope of 29 mV dec^–1 and stability of up to 10 days, outperforming reported Ru-based catalysts and Pt/C. The experimental and DFT studies disclose that the hydroxyl migration-assisted dissociation of water and interface-engineering desorption of H₂ process, occurring at the mutually hybridized interface sites of Ru/MoS₂/CFP, simultaneously speed Volmer/Tafel processes. Compared to Ru, the stronger interaction of 1T-MoS₂ to OH* makes OH* migrate from Ru to MoS₂, alleviating the poisoning of Ru sites. Also, only Ru NPs close to the interface of 1T-MoS₂/CFP can achieve an optimal hydrogen adsorption energy for high HER performance. This designed strategy provides a novel idea for preparing supported Ru catalysts for excellent HER performance.

由于其快速的水解离动力学，Ru 被认为是析氢反应 (HER) 中高效的无 Pt 催化剂。然而，其对 OH* 和 H* 的强亲和力极大地限制了其 HER 性能。在此，_设计并合成了具有三种界面（MoS 2 _{/ CFP}、 Ru/CFP 和 Ru/MoS ₂ ) 作为优异的 HER 电催化剂。特别是，Ru ₂ @MoS ₂ -85%/CFP 表现出卓越的 HER 性能，在 10 mA cm ^{-2下具有 19 mV 的过电位、29 mV dec –1}的低塔菲尔斜率和长达 10 天的稳定性，优于报道的 Ru基催化剂和 Pt/C。实验和DFT研究表明，在Ru/MoS ₂ /CFP的相互杂化界面位点发生的羟基迁移辅助的水解离和H ₂过程的界面工程解吸同时加速了Volmer/Tafel过程。与Ru相比，1T-MoS ₂与OH*更强的相互作用使得OH*从Ru迁移到MoS ₂，从而减轻Ru位点的中毒。此外，只有靠近 1T-MoS ₂ /CFP界面的 Ru NP才能实现最佳的氢吸附能，从而实现高 HER 性能。这种设计策略为制备具有优异 HER 性能的负载型 Ru 催化剂提供了新思路。