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投稿时间:2013-05-07 修订日期:2013-05-13 录用日期:2013-05-14 网络发布日期:2013-11-20
投稿时间:2013-05-07 修订日期:2013-05-13 录用日期:2013-05-14 网络发布日期:2013-11-20
中文摘要: 以机械球磨为制备方法,利用Sievert等容法吸放氢性能测试法系统地研究了有序介孔SiO2和Sm2O3复合改性NaAlH4体系的储氢性能。并利用XRD、FESEM和HRTEM来表征体系的物相和微观结构。结果表明,Sm2O3单掺杂可以改善NaAlH4的脱氢性能,4 h时NaAlH4?Sm2O3体系的放氢量约为3.6%,而有序介孔SiO2和Sm2O3复合掺杂改性NaAlH4体系4 h时的放氢量达到4.3%,且循环吸放氢性能得到加强。同时对有序介孔SiO2和Sm2O3对NaAlH4体系的改性机理进行了探讨。
Abstract:The hydrogen storage properties of NaAlH4 with Sm2O3 and ordered mesoporous SiO2 as codopants by ball-milling were systematically investigated with Sievert’s technology test. The microstructures and phase transformation of milled samples were characterized by XRD, FESEM and HRTEM. The results show that hydrogen desorption is 3.6% in amount within 4 h for Sm2O3-doped NaAlH4, increases to 4.3% in amount once codoped by ordered mesoporous SiO2. The addition of mesoporous SiO2 enhances dehydrogenation kinetics and cycle stability of NaAlH4. Moreover, the modification mechanism of Sm2O3 and mesoporous SiO2 on dehydrogenation of NaAlH4 is discussed.
keywords: NaAlH4 Sm2O3 ordered mesoporous SiO2 hydrogen storage
文章编号: 中图分类号: 文献标志码:
基金项目:国家自然科学基金重点项目(51134007)
| 作者 | 单位 | |
| 孙迪波 | 中南大学化学化工学院 | sundibo35@163.com |
| 陈启元* | 中南大学化学化工学院 | cqy@mail.csu.edu.cn |
| 翁国庆 | 湖南稀土金属材料研究院 | |
| 李文章 | 中南大学化学化工学院 | |
| 马小波 | 湖南稀土金属材料研究院 |
| Author Name | Affiliation | |
| Sun Dibo | School of Chemistry and Chemical Engineering,Central South University | sundibo35@163.com |
| Chen QiYuan | cqy@mail.csu.edu.cn | |
| Weng guoqing | ||
| Li Wenzhang | ||
| Ma Xiaobo |
引用文本:
孙迪波,陈启元,翁国庆,李文章,马小波.稀土Sm2O3和有序介孔SiO2复合改性NaAlH4储氢性能的研究[J].有色金属(冶炼部分),2013(12):35-39.
Sun Dibo,Chen QiYuan,Weng guoqing,Li Wenzhang,Ma Xiaobo.Co-effects of Sm2O3 and Ordered Mesoporous SiO2 on Reversible Hydrogen Storage in NaAlH4[J].Nonferrous Metals (Extractive Metallurgy),2013(12):35-39.
孙迪波,陈启元,翁国庆,李文章,马小波.稀土Sm2O3和有序介孔SiO2复合改性NaAlH4储氢性能的研究[J].有色金属(冶炼部分),2013(12):35-39.
Sun Dibo,Chen QiYuan,Weng guoqing,Li Wenzhang,Ma Xiaobo.Co-effects of Sm2O3 and Ordered Mesoporous SiO2 on Reversible Hydrogen Storage in NaAlH4[J].Nonferrous Metals (Extractive Metallurgy),2013(12):35-39.

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