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采用方波脉冲方法,在钯镍合金电解液中成功地电化学沉积出镍原子含量分别为12.0%、16.4%和22.6%的钯镍合金纳米颗粒.钯镍合金纳米颗粒为球状,粒径50~80 nm.随钯镍合金生长电位负移,合金的镍含量提高,其纳米颗粒大小基本相似但纳米颗粒数目增多,交联度提高和真实活性面积增大.钯镍合金纳米颗粒镍含量提高,在硫酸溶液中其氢弱吸附峰电流增大.钯镍合金纳米颗粒电极的甲酸电催化氧化活性较好,随合金纳米颗粒的镍含量提高和交联度增加,合金纳米颗粒电极的甲酸电催化氧化稳定性更高.
The square-wave pulse method was used to successfully electrochemically deposit palladium-nickel alloy nanoparticles with 12.0%, 16.4% and 22.6% nickel atoms respectively in the palladium-nickel alloy electrolyte.The palladium-nickel alloy nanoparticles were spherical with particle size of 50 ~ 80 nm. With the negative shift of the growth potential of palladium-nickel alloy, the nickel content of the alloy increases, the size of the nanoparticles is basically similar but the number of nano-particles increases, the crosslinking degree increases and the real active area increases. , The peak current of hydrogen weakening adsorption increased in sulfuric acid solution.The electrocatalytic oxidation of formic acid on palladium-nickel alloy nanoparticle electrode was better.With the increase of nickel content of alloy nanoparticles and the increase of crosslinking degree, the formic acid of the alloy nanoparticle electrode Catalytic oxidation of higher stability.