【摘要】 以层状双金属氢氧化物/碳复合物为前驱体通过原位还原法进行了高分散纳米镍粒子的制备。通过X射线衍射(XRD)、透射电镜(TEM)、比表面积(BET)和热分析(TG-DSC)对产物结构与形貌以及催化性能进行了研究。结果表明,在惰性气氛下前驱体经还原得到高分散的纳米镍粒子,粒径约10 nm。复合前驱体中的碳作为还原剂,将层状前驱体衍生的金属氧化物原位还原为金属镍纳米粒子,还原反应进行彻底;反应温度对还原产物的相组成有重要影响。另外,纳米镍对高氯酸铵热分解显示了较好的催化作用。更多还原

【Abstract】 Highly dispersed Ni nanoparticles were prepared by a method of in situ reduction from the layered double hydroxide/carbon composite precursor.The materials were characterized by XRD,TEM,BET and TG-DSC.The results indicated that metallic Ni nanoparticles in situ with a size of around 10 nm via the temperature-controlled calcination in an inert atmosphere were obtained.It was concluded that the carbon existing in the composite played a role of reducing agent and thus reduced oxidized nickel species into metallic Ni nanoparticles during heating.The results indicated that the reaction temperature had an important impact on the composition of the product.In addition,the nickel nanoparticles exhibited excellent catalytic behavior for thermal decomposition of ammonium perchlorate.更多还原