【作者】 孟伟； 王艳； 张轲； 曹中秋； 曲欣慧；

【Author】 Wei Meng;Yan Wang;Ke Zhang;Zhongqiu Cao;Xinhui Qu;College of Chemistry and Chemistry Engineering, Shenyang Normal University;

【机构】 沈阳师范大学化学化工学院；

【摘要】 硼氢化钠因具有较高的质量储氢容量（10.6wt.%）而成为较有潜力的储氢材料之一[1]。在有催化剂存在的条件下,它可以通过水解的方式释放氢气[2],因此,开发性能较优,价格便宜的催化剂成为硼氢化钠水解制氢的关键。本文采用化学镀法成功制备了形貌可控的纳米Co-Ni-P催化剂,结果表明:当镀液pH值为12.0、NaH₂PO₂的浓度为0.8 mol·L^-1、施镀时间为10 min时,为制备的Co-Ni-P催化剂最优条件。此时制备的催化剂是由许多尺寸约为50 nm左右的小颗粒堆积而成的类蛇莓状结构,其催化NaBH₄水解的放氢速率为2172.4 mL·min^-1g^-1,该催化剂经过五次重复利用后,其速率值仍为起始放氢速率的81.4%,这表明该催化剂具有高的催化性能和一定的循环性能。在该催化剂作用下,NaBH₄水解制氢的活化能为53.5 kJ·mol^-1。更多还原

【Abstract】 In this study,we successfully fabricated nanostructureed Co-Ni-P catalyst with different morphology by electroless plating method.It is found that the optimum preparation conditions is pH value of 12.0,NaH₂PO₂ concentration of 0.8 mol L^-1,and the deposition time of 10 min.The as-prepared catalyst exhibits a duchesnea-like structure with aggregated nanoparticles with the diameter of about 50 nm.The results show that the Co-Ni-P catalyst presents high performance in the hydrolysis of sodium borohydride.The rate of hydrogen evolution is 2172.4 mL min^-1 g^-1.The value is about 80.5% of the initial hydrogen generation rate after 5 cycles,which indicates much improved reusability.The activation energy of NaBH₄ hydrolysis in the presence of these Co-Ni-P catalysts is53.5 kJ mol^-1.更多还原