刘明娣;刘全兴;董亚娜;米刚;张军;

• 1:河南科技大学应用工程学院
• 2:河南科技大学化工与制药学院

摘要(Abstract)：

以CoCl_2、NiCl_2及NaBH_4分别作为Co、Ni和B源,通过改变原料物质的量配比和加入不同类型表面活性剂,采用温和的液相还原路线制备了系列三元双金属非晶态合金Co-Ni-B。借助X射线衍射(XRD)仪和扫描电镜(SEM)等,确定了产物的物相结构和微观形貌特征。研究结果表明:所得Co-Ni-B产物均有典型的非晶态合金结构,呈微球状,粒径分布为30～100 nm。表面活性剂辅助所得Co-Ni-B的形貌转化为丝网交联的泡沫海绵状三维结构,孔隙率增大,比表面积提高。Co-Ni-B非晶态合金对氨硼烷水解释氢具有很高的催化活性,可在10 min内实现完全释氢,金属的质量分数越高,催化能力越强。而加入表面活性剂辅助制得的Co-NiB产物,比表面积增大,催化能力进一步增强。反应温度越高,越有利于提升释氢速率。水解反应符合零级反应动力学特征,表观活化能为34.16 k J·mol~(-1)。

关键词(KeyWords)： 非晶态合金;Co-Ni-B;制备;氨硼烷;催化水解

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(21576073,21076063)

作者(Author): 刘明娣;刘全兴;董亚娜;米刚;张军;

Email:

DOI: 10.15926/j.cnki.issn1672-6871.2019.04.018

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