关键词:

Pd-Ni/GC电极, Pd-Ni/PPy/GC电极, 循环伏安

Abstract:

The electrochemical deposition behavior of Pd-Ni bimetal on glassy carbon (GC) electrode was studied by means of cyclic voltammetry (CV) based on orthogonal experiments.The optimum preparation conditions of Pd-Ni/GC electrode were Ni²⁺=8.5 mmol·L^-1, Pd²⁺=3 mmol·L^-1, pH=7.0, J_k=15 mA·cm^-2, and T=30 min.The hydrogen adsorption peak on Pd-Ni/GC electrode of -24.83 mA was obtained at about -500 mV (vs Hg/Hg₂SO₄).Pd-Ni/PPy/GC electrode modified by polypyrrole film was prepared.CV results revealed that the hydrogen adsorption peak of -32.33 mA was obtained at about -500 mV (vs Hg/Hg₂SO₄), which was larger than that on Pd-Ni/GC electrode.Scanning electron microscope (SEM) images revealed that PPy film changed the deposition configuration of Pd-Ni particles evidently.The diameters of Pd-Ni microparticles were smaller and the dispersion degree was higher.

Key words:

Pd-Ni/GC电极, Pd-Ni/PPy/GC电极, 循环伏安