2026-10-13T12:18:56Z https://www.scidb.cn/oai

10.57760/sciencedb.43562 2026-08-03T16:40:38Z

2026-08-03 Phosphorus Vacancy-Engineered Ru,Pv–CoP as a Hydrogen Spillover Catalyst for Enhanced Industrial Alkaline Water Electrolysis doi:10.57760/sciencedb.43562 en Developing industrial-grade electrocatalysts based on the hydrogen spillover (HSo) mechanism is a key approach for translating lab-scale performance into industrial applications. Herein, a novel HSo catalyst (Ru,Pv–CoP/CF) was constructed by introducing phosphorus vacancies (Pv) into a CoP support decorated with Ru nanocrystals (Ru NCs) and Ru single atoms (Ru SAs) via defect-engineering strategy. The creation of Pv modulates the interfacial properties between Ru species and CoP, enabling electronic coupling between Ru and Co through phosphorus bridging and forming a “Ru–Co” donor-acceptor electron pair. Multidimensional in-situ electrochemical measurements reveal that Pv accelerates the polarization/dissociation of water molecules and the capture/migration of adsorbed hydrogen (H*). Further DFT calculations underscore that Pv narrows the work function difference between Ru NC and RuSA–CoP, which enhances the electron supply from Ru NC to Co, thereby triggering an efficient H* cross-phase transmission. Specifically, Ru NCs primarily facilitate H2O dissociation, and the generated H* subsequently spillover to adjacent Co sites for H2 desorption. Benefiting from the Pv–mediated relay catalysis, the Ru,Pv–CoP/CF catalyst exhibits top-level HER properties in 1.0 M KOH, requiring only 86 mV at an industrial current density of 1.0 A cm−2 with exceptional durability over 1200 h. This work advances the fundamental understanding of vacancy-guided HSo mechanism, providing unique insights for designing transition metal phosphides-based electrocatalysts for industrial alkaline water electrolysis.  Hydrogen spillover; phosphorus vacancies; Ru nanocrystals; transition metal phosphides; industrial alkaline water electrolysis. Juan Xiao Tingting Huang Xia Liu Yuying Feng Guancheng Xu Li Zhang EMBARGO https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank