Preparation and Electrochemical Performance Comparison of Palladium-Nickel Bimetal Modified Electrodes

The electrochemical deposition behaviors of Pd-Ni bimetal on different matrix materials were studied by means of the preparation of Pd-Ni/GC, Pd-Ni/foam-Ni and Pd-Ni/Ti electrodes. The effect of the matrix materials to the electrocatalytic activity of electrodes was investigated. CV results reveal that hydrogen absorbability of Pd-Ni/Ti electrode was obviously higher than the Pd-Ni/GC and Pd-Ni/foam-Ni electrodes and can get hydrogen adsorption peak of -121.08mA at -500mV (vs Hg/Hg₂SO₄). Scanning Electron Microscope (SEM) images reveal that Ti net is a better matrix material for disperse and deposition of bimetallic catalyst. Atomic Emission Spectrometry (AES) analyzed results indicate that The proper percent contents of Pd and Ni on Ti net elevate the catalyst activity of Pd-Ni bimetal. The high electrocatalytic activity electrode was obtained under nearly the same Pd deposit quantity and the decrease of the total catalyst deposit quantity, which has the high potential of reductive dechlorination.