复合储氢材料NaNH2-NaBH4在Ni-Co-B催化剂促进下的热分解

白莹; 吴锋; 杨建虎; 吴川; 包丽颖

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Ni-Co-B catalyst promoted Thermal Decomposition of Composite NaNH2-NaBH4 used as Hydrogen Storage Material

首发时间：2014-03-28

BAI Ying ¹
BAI Ying (1975-), female, associated professor. Her research interests include hydrogen storage materials, and key materials for advanced batteries.
WU Feng ¹ YANG Jianhu ¹ WU Chuan ¹
WU Chuan (1974-), male, professor of Beijing Institute of Technology. His research interests are focusing on the energy storage and conversion materials and systems.
BAO Liying ¹

1、Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, China

Abstract：NaNH2 and NaBH4 are structured as a composite hydrogen storage material, NaNH2-NaBH4. To improve the thermal decomposition kinetics of NaNH2-NaBH4, which is crucial to hydrogen releasing performance, Ni-Co-B is selected as a catalyst. To get the catalyst-promoted light-weight hydrogen storage materials, the composite hydrogen storage system was synthesized via a ball milling method with NaNH2, NaBH4 and Ni-Co-B. X-ray diffraction patterns show that the crystal structure of the NaNH2-NaBH4 is well kept after adding catalysts. In addition, Na3BN2 and metal Na are detected as a by-product in the Ni-Co-B promoted NaNH2-NaBH4 (2/1) through the thermal decomposition process. In addition, TG-DTA analysis indicates that the main decomposition stages of the metal boride promoted NaNH2-NaBH4 materials are split into three stages. Furthermore, the catalytic effects on the thermal decomposition kinetics are evaluated. The activation energy of the Ni-Co-B promoted NaNH2-NaBH4 below 250oC is 99KJ/mol, which are only 62.0% of that of the pristine NaNH2-NaBH4 (2/1), and implying better kinetics at low temperature decomposition range.

keywords： Fuel cells hydrogen storage material NaNH2-NaBH4 thermal decomposition kinetics

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复合储氢材料NaNH2-NaBH4在Ni-Co-B催化剂促进下的热分解

白莹 ¹
BAI Ying (1975-), female, associated professor. Her research interests include hydrogen storage materials, and key materials for advanced batteries.
吴锋 ² 杨建虎 ² 吴川 ²
WU Chuan (1974-), male, professor of Beijing Institute of Technology. His research interests are focusing on the energy storage and conversion materials and systems.
包丽颖 ²

1、北京理工大学化工与环境学院环境科学与工程北京市重点实验室
2、Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, China

摘要：以NaNH2和NaBH4为原料制备了复合储氢材料 NaNH2-NaBH4. 利用Ni-Co-B催化剂来改善其热分解释氢的动力学. 采用球磨法，将NaNH2, NaBH4与Ni-Co-B进行复合，制备了含有催化剂的轻质储氢体系。 X射线衍射表明NaNH2-NaBH4的晶体结构在添加催化剂之后仍然保持良好。在热分解过程中，由于副反应的发生，而产生了Na3BN2 和金属Na等副产物。此外，热重-差热分析表明，NaNH2-NaBH4的主要热分解过程分为三个阶段，并评估了催化剂对热分解动力学的影响。对于Ni-Co-B促进的NaNH2-NaBH4体系，在250oC以下的热分解活化能为99KJ/mol，仅仅是未添加催化剂NaNH2-NaBH4的62.0% ，说明低温范围内的热分解获得了很大的改善。

关键词：燃料电池储氢材料 NaNH2-NaBH4 热分解动力学

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BAI Ying,WU Feng,YANG Jianhu,et al. Ni-Co-B catalyst promoted Thermal Decomposition of Composite NaNH2-NaBH4 used as Hydrogen Storage Material[EB/OL]. Beijing:Sciencepaper Online[2014-03-28]. https://www.paper.edu.cn/releasepaper/content/201403-802.

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论文编号	201403-802
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