第四周期过渡金属催化硼氢化钠分解制氢研究

发布时间：2018-05-11 17:10

本文选题：过渡金属 + 硼氢化钠　；参考：《无机盐工业》2017年05期

【摘要】：考察了MnSO_4、FeSO_4、CoCl_2、NiCl_2和CuCl等盐原位还原催化硼氢化钠的水解制氢性能,实验确定催化硼氢化钠水解制氢活性高低顺序:CoClNiClFeSO_4CuCl_2MnSO_4,并发现这与第四周期过渡金属d轨道上的电子数有密切关系。硼氢化钠分解产氢速率与FeSO_4、CoCl_2和NiCl_2用量成正比,说明催化硼氢化钠水解产氢的活性中心为过渡金属,且硼氢化钠水解产氢反应对盐的用量为一级反应。实验计算出FeSO_4、CoCl_2和NiCl_2催化硼氢化钠分解制氢反应的活化能分别为52.01、46.33、58.70 kJ/mol,发现硼氢化钠产氢速率与活化能之间没有必然联系。
[Abstract]:The hydrolysis of sodium borohydride by in-situ reduction of MnSO4COCOCl2NiCl2 and CuCl was investigated. The order of activity of catalytic hydrolysis of sodium borohydride to produce hydrogen was determined by experiments, and it was found that this was closely related to the number of electrons on the transition metal d orbital of the fourth cycle. The order of catalytic activity of catalytic hydrolysis of sodium borohydride to hydrogen production was determined as follows: CoClNiClFeSO4CuCl2MnSO4, which is closely related to the number of electrons in the transition metal d orbital of the fourth cycle. The decomposition rate of sodium borohydride is proportional to the amount of FeSO4CoCl2 and NiCl_2, which indicates that the active center of catalytic hydrolysis of sodium borohydride for hydrogen production is transition metal, and the amount of sodium borohydride hydrolysis to produce hydrogen is the first order reaction. The activation energy of FeSO4CoCl2 and NiCl_2 for the decomposition of sodium borohydride to produce hydrogen was calculated to be 52.01 ~ 46.33 ~ 58.70 kJ / mol, respectively. It is found that there is no definite relationship between the rate of hydrogen production and the activation energy of sodium borohydride.
【作者单位】：郑州师范学院化学化工学院环境与催化工程研究所;郑州大学化学与分子工程学院;
【基金】：国家自然科学基金资助项目(21273205,U1304204) 河南省科技攻关项目(162102210333) 河南省高等学校重点科研项目(16A150025) 河南省高校科技创新团队支持计划项目(16IRTSTHN001)
【分类号】：TQ116.2

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