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Synergy Between Ru3 Nanoclusters and Pt Nanoparticles for High-Efficiency Alkaline Hydrogen Evolution Reaction
Xiuting Fu1, Xuxin Kang2, Ruhao Wang1
1State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, China.
None:
To achieve efficient alkaline hydrogen evolution reaction (HER), catalysts should be rationally designed with optimized water adsorption energy, low H-OH dissociation energy barrier, and appropriate hydrogen bond energy (HBE). However, simultaneously satisfying these requirements remains a major challenge for single-component catalysts. Here, we report a dual-site synergistic catalyst composed of atomically precise Ru3 nanoclusters and Pt nanoparticles (Ru3@Pt NPs/C). Characterization results reveal Ru3 nanoclusters are distributed around Pt nanoparticles. Compared with single-component catalyst, Ru3@Pt NPs/C exhibits superior catalytic activity, achieving a current density of 10 mA cm-2 at an ultra-low overpotential of only 10 mV, and the mass activity reached 0.488 A mg-1 PGM, which was 1.85 times that of commercial Pt/C (0.264 A mg-1 PGM). Furthermore, Ru3@Pt NPs/C exhibits a low cell voltage of 1.75 V at 1 A cm-2 in the anion exchange membrane electrolyzer. Density functional theory (DFT) calculations reveal its superior performance stems from a relay catalytic mechanism: water molecules are preferentially adsorbed and dissociated at Ru site, while the generated *H rapidly migrate to neighboring Pt sites, where they efficiently recombine to form H2. This study proposes an innovative dual-component catalytic architecture that integrates triatomic clusters with nanoparticles, providing new perspectives for atomic-scale design of advanced catalysts.
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