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 afte...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.展开更多
基金supported by the National Natural Science Foundation of China (52172110)the “Scientific and Technical Innovation Action Plan” China Science&Technology Cooperation Project of Shanghai Science and Technology Committee (21520760500)+1 种基金the “Super Postdoctoral Incentive Program” of Shanghai Municipal Human Resources and Social Security Bureau (2021411)Special Research Assistant Grant Project from Chinese Academy of Sciences
文摘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.
