摘要
Amorphous Ni B/SiO2 catalysts were prepared by chemical reduction of Ni2＋with KBH4.ICP was used to analyze the composition of alloys.XRD,TEM,SAED and HREM were used to examine the structures of samples fresh and after thermal treatment in different atmospheres.The results indicated that the supported NiB has a higher structural stability than ultrafine NiB amorphous alloy.Low temperature pretreatment in hydrogen can reduce nickel oxide on the surface of catalysts.However,treatment in hydrogen is more favorable than in atmosphere and nitrogen for keeping it in stable state.
Amorphous Ni B/SiO2 catalysts were prepared by chemical reduction of Ni2＋with KBH4.ICP was used to analyze the composition of alloys.XRD,TEM,SAED and HREM were used to examine the structures of samples fresh and after thermal treatment in different atmospheres.The results indicated that the supported NiB has a higher structural stability than ultrafine NiB amorphous alloy.Low temperature pretreatment in hydrogen can reduce nickel oxide on the surface of catalysts.However,treatment in hydrogen is more favorable than in atmosphere and nitrogen for keeping it in stable state.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2000年第2期180-183,共4页
Acta Physico-Chimica Sinica
基金
国家自然科学基金和石化总公司资助
关键词
非晶态催化剂
结构表征
镍硼合金
热处理
Ni B amorphous catalyst, Crystallization, Structure characterization
