Thermal decomposition of sodium amide, NaNH2, and sodium amide hydroxide composites, NaNH2-NaOH
文献类型：期刊论文
| 作者 | Jepsen, Lars H.1,2,3; Wang, Peikun4; Wu, Guotao4; Xiong, Zhitao4; Besenbacher, Flemming5,6; Chen, Ping4; Jensen, Torben R.1,2 |
| 刊名 | PHYSICAL CHEMISTRY CHEMICAL PHYSICS
 |
| 出版日期 | 2016-09-28 |
| 卷号 | 18期号:36页码:25257-25264 |
| ISSN号 | 1463-9076 |
| DOI | 10.1039/c6cp01604a |
| 文献子类 | Article |
| 英文摘要 | Sodium amide, NaNH2, has recently been shown to be a useful catalyst to decompose NH3 into H-2 and N-2, however, sodium hydroxide is omnipresent and commercially available NaNH2 usually contains impurities of NaOH (<2%). The thermal decomposition of NaNH2 and NaNH2-NaOH composites is systematically investigated and discussed. NaNH2 is partially dissolved in NaOH at T > 100 degrees C, forming a non-stoichiometric solid solution of Na(OH)(1-x)(NH2)(x) (0 < x < similar to 0.30), which crystallizes in an orthorhombic unit cell with the space group P2(1)2(1)2(1) determined by synchrotron powder X-ray diffraction. The composite xNaNH(2)-(1 - x)NaOH (similar to 0.70 < x < 0.72) shows a lowered melting point, similar to 160 degrees C, compared to 200 and 318 degrees C for neat NaNH2 and NaOH, respectively. We report that 0.36 mol of NH3 per mol of NaNH2 is released below 400 degrees C during heating in an argon atmosphere, initiated at its melting point, T = 200 degrees C, possibly due to the formation of the mixed sodium amide imide solid solution. Furthermore, NaOH reacts with NaNH2 at elevated temperatures and provides the release of additional NH3. |
| WOS关键词 | HYDROGEN STORAGE MATERIALS ; AMMONIA ; BOROHYDRIDES ; DIFFRACTION ; HYDRIDES ; SYSTEM ; NA3N |
| WOS研究方向 | Chemistry ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000384249300051 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/170150]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Jensen, Torben R. |
| 作者单位 | 1.Aarhus Univ, Interdisciplinary Nanosci Ctr, Ctr Mat Crystallog, Langelandsgade 140, DK-8000 Aarhus C, Denmark 2.Aarhus Univ, Dept Chem, Langelandsgade 140, DK-8000 Aarhus C, Denmark 3.Danish Technol Inst, Kongsvang Alle 29, DK-8000 Aarhus C, Denmark 4.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 5.Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, Ny Munkegade 120, DK-8000 Aarhus C, Denmark 6.Aarhus Univ, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark |
| 推荐引用方式 GB/T 7714 | Jepsen, Lars H.,Wang, Peikun,Wu, Guotao,et al. Thermal decomposition of sodium amide, NaNH2, and sodium amide hydroxide composites, NaNH2-NaOH[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2016,18(36):25257-25264. |
| APA | Jepsen, Lars H..,Wang, Peikun.,Wu, Guotao.,Xiong, Zhitao.,Besenbacher, Flemming.,...&Jensen, Torben R..(2016).Thermal decomposition of sodium amide, NaNH2, and sodium amide hydroxide composites, NaNH2-NaOH.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,18(36),25257-25264. |
| MLA | Jepsen, Lars H.,et al."Thermal decomposition of sodium amide, NaNH2, and sodium amide hydroxide composites, NaNH2-NaOH".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18.36(2016):25257-25264. |
入库方式： OAI收割
来源：大连化学物理研究所
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