Ultrafine and high-density RuP₂ based on coordination chemistry and catalyst-support correlation shows potential for hydrogen evolution reaction (HER). Herein, the uniform and high-density W-doped ultra-small RuP₂ (W_0.05-RuP₂@C₃N₄-NC) are synthesized by incorporating oxygen-bridged [WO₄] tetrahedron into tetraacetic acid (EDTA)-melamino-formaldehyde (MF) ligands. EDTA-MF shows strong metal-support interaction, dedicating to the optimal dispersion, highest Ru yields, and HER activity. W atoms regulate local electron structure and coordination environment, leading to faster proton supply and hydrogen release, thus achieving 10 mA cm⁻² at low overpotential of 27 mV (alkaline) and 66 mV (acidic). Notably, W_0.05-RuP₂@C₃N₄-NC maintains stability with staged 500–1000 mA cm⁻² for 1000 h in alkaline, and 1000 mA cm⁻² for ~300 h in acid, ascribing to the immobilized ultra-stable RuP₂ nanoclusters via EDTA-MF and metal-oxygen sites. The excellent activity and stability hold promise for industrial hydrogen production, which provides deeper insights into catalyst-support interaction and reasonable design of high Ru-loading electrocatalysts.

基于配位化学和催化剂-载体相关性的超细和高密度 RuP ₂显示出析氢反应 (HER) 的潜力。在此，通过将氧桥联的 [WO ₄ ] 四面体掺入四乙酸 (EDTA)-三聚氰胺中，合成了均匀且高密度的 W 掺杂超小 RuP ₂ (W _0.05 -RuP ₂ @C ₃ N ₄ -NC)。-甲醛 (MF) 配体。EDTA-MF 显示出强烈的金属-载体相互作用，致力于实现最佳分散、最高 Ru 产率和 HER 活性。W原子调节局部电子结构和配位环境，导致更快的质子供应和氢释放，从而实现10 mA cm ^-2在 27 mV（碱性）和 66 mV（酸性）的低过电位下。值得注意的是，W _0.05 -RuP ₂ @C ₃ N ₄ -NC在碱性中保持 500–1000 mA cm ^-2 1000 小时的稳定性，在酸中保持1000 mA cm ^-2约 300 小时的稳定性，这归因于固定化的超-通过 EDTA-MF 和金属-氧位点稳定的 RuP ₂纳米团簇。优异的活性和稳定性有望用于工业制氢，这为催化剂-载体相互作用和高 Ru 负载电催化剂的合理设计提供了更深入的见解。