FeNi_3催化剂的制备及其对NaBH_4水解制氢的催化活性评价  

Synthesis of Bimetal Compound FeNi_3 and Evaluation of Its Catalytic Activity to NaBH_4 Hydrolysis

作　　者：姚海瑞[1] 郑喜俊[1] 张军[1] 李晶晶[1] 白孝康 

机构地区：[1]河南科技大学化工与制药学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2014年第5期100-104,113,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(21076063);河南省科技攻关基金项目(102102210170);洛阳市科技攻关基金项目(1101030A);洛阳市矿产资源化工重点实验室建设基金项目(1003016A)

摘　　要：以水溶性镍盐和铁盐为金属源,通过水合肼作为还原剂,聚乙烯吡咯烷酮作为模板和稳定剂,采用水热法在碱性溶液中制备出了双金属化合物FeNi3。考察了聚乙烯吡咯烷酮和碱液浓度对产物形貌和物相的影响,借助X射线粉末衍射和透射电镜手段,分别对产物进行了表征和分析。同时,通过调控不同的反应条件,比较了FeNi3以及不同形貌的Ni粉对于NaBH4水解产氢速率的影响,从而对FeNi3的催化活性进行了评价。研究结果表明:在试验设定的条件下,所得产物均为结晶度良好的微纳米整比化合物FeNi3,聚乙烯吡咯烷酮的加入能够有效地改善产物的结晶习性,而且有助于形成粒径均匀的高分散性微纳米菱形片形状;在相同的水解条件下,30℃时,反应开始后10 min内FeNi3对NaBH4的催化水解制氢速率比单质金属镍微粉高出26.8%以上,表明FeNi3的催化活性明显高于单质镍粉。The bimetallic compound FeNi3 was prepared by hydrothermal method in the alkaline solution with water soluble nickel salt and iron salt as the source of metal,hydrazine hydrate as reductant,and polyvinylpyrrolidone( PVP) as template and stabilizer. The effects of concentration of polyvinylpyrrolidone and sodium hydroxide on morphology and phase of the product were detailedly investigated. The products were characterized and analyzed respectively by means of X-ray powder diffraction and transmission electron microscopy( SEM). Besides,the preliminary evaluation of the catalytic activity of FeNi3 was carried out by regulating different reaction conditions. Comparation of the catalytic activity for hydrogen generation rate of NaBH4 hydrolysis catalyzed by FeNi3 or by Ni powder was made. The results show that under the given experimental condition the products are pure stoichiometric FeNi3 micro-nano particles with good crystallinity.The addition of polyvinylpyrrolidone can effectively improve crystallization behavior of the product and help to form micro-nano lozenge thin plate with uniform particle size and high dispersion. It is verified that the catalytic activity of FeNi3 is obviously higher than that of nickel powder. Within the initial 10 minutes the catalytic activity of FeNi3 is 26. 8% higher than that of nickel powders under the same hydrolysis condition at 30 ℃.

关 键 词：制备 FeNi3 NABH4 产氢 催化 

分 类 号：TQ423[化学工程]