Pt-Ru合金在 40g/L NaF介质中氢气氧化行为研究

o address the bottlenecks of insufficient hydrogen oxidation reaction(HOR)activity and high cost of platinum-based catalysts in alkaline media, this study focuses on the preparation of high-performance Pt-Ru alloy sensitive film materials and investigates their hydrogen oxidation behavior in 40 g/L NaF electrolyte. The influence of Pt content on the alloy\'s microstructure, electronic properties, and catalytic performance is systematically analyzed, providing theoretical foundations and technical support for optimizing the performance of electrochemical hydrogen dissolution sensors.Pt-Ru alloys with varying Pt/Ru molar ratios(ranging from 4:4 to 16:4) were fabricated via pulsed electrodeposition. Their crystal phase structure, surface chemical states, and microscopic morphology were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Hydrogen oxidation activity and stability in 40g/L NaF electrolyte were evaluated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV). Kinetic parameters were further analyzed using theButler-Volmer model.For the alloy with Pt:Ru=16:4, the lattice refinement effect of Ru reduces the average grain size to 7.9 nm. XPS analysis reveals electron transfer from Ru to Pt, resulting in a 0.3 eV downshift of the Pt d-band center. The exchange current density (j?=0.35782mA/cm2) exhibits a threefold increase compared to pure Pt (0.114 mA/cm2), demonstrating enhanced HOR kinetics.