核壳结构镍的制备及催化性能

Fabrication and Catalytic Activity of Nickel Core-shell Structure

利用软化学方法制备出了聚苯乙烯(PS)镍/核壳结构和纳米镍催化剂,并利用SEM和XRD对材料的形貌和结构进行了表征.将上述催化剂应用于亚甲基蓝染料加氢反应,一步实现染料褪色和硼氢化钠水解制氢.研究结果表明,核壳结构极大地提高了镍的催化能力.在相同条件下,核壳结构镍的加氢催化效率是纳米镍的1.42倍,产氢效率是纳米镍的4.76倍,这说明核壳结构在催化领域具有一定的优势.

Nickel has received wide application in industry catalyst field.PS/Ni core-shell structure and Ni nanoparticles were fabricated by soft chemical methods,and SEM,XRD were used to characterize the morphology and structure of samples.The catalytic performances of the PS/Ni and Ni nanoparticles were evaluated using methylene blue as a model reagent.This experiment realized degradation of dye and hydrogen production via NaBH4 hydrolysis in one step.The results show that the core-shell structure promotes the catalytic activity of nickel.The degradation efficiency of dye and hydrogen production velocity using PS/Ni catalyst is 1.42 and 4.76 times higher than that using Ni nanoparticle catalyst,respectively.The advantage of core-shell structure in catalysis is proved.