Solid-Solid Heterogeneous Catalysis: The Role of Potassium in Promoting the Dehydrogenation of the Mg(NH2)(2)/2 LiH Composite
文献类型：期刊论文
| 作者 | Wang, Jianhui1,2; Chen, Ping1; Pan, Hongge2; Xiong, Zhitao1; Gao, Mingxia2; Wu, Guotao1; Liang, Chu2; Li, Cao2; Li, Bo2; Wang, Jieru2 |
| 刊名 | chemsuschem
 |
| 出版日期 | 2013-11-01 |
| 卷号 | 6期号:11页码:2181-2189 |
| 关键词 | dehydrogenation heterogeneous catalysis hydrides magnesium potassium |
| 英文摘要 | considerable efforts have been devoted to the catalytic modification of hydrogen storage materials. the k-modified mg(nh2)(2)/2lih composite is a typical model for such studies. in this work, we analyze the origin of the kinetic barrier in the first step of the dehydrogenation and investigate how k catalyzes this heterogeneous solid-state reaction. our results indicate that the interface reaction of mg(nh2)(2) and lih is the main source of the kinetic barrier at the early stage of the dehydrogenation for the intensively ball-milled mg(nh2)(2)/2lih sample. k can effectively activate mg(nh2)(2) as well as promote lih to participate in the dehydrogenation. three k species of kh, k2mg(nh2)(4), and li3k(nh2)(4) likely transform circularly in the dehydrogenation (khk2mg(nh2)(4)kli3(nh2)(4)), which creates a more energy-favorable pathway and thus leads to the overall kinetic enhancement. this catalytic role of k in the amide/hydride system is different from the conventional catalysis of transition metals in the alanate system. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, multidisciplinary |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | n-h system ; hydrogen storage properties ; hydride ; desorption ; mechanism ; complex ; amide ; kinetics ; sorption ; libh4 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000326840000029 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/137907]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jianhui,Chen, Ping,Pan, Hongge,et al. Solid-Solid Heterogeneous Catalysis: The Role of Potassium in Promoting the Dehydrogenation of the Mg(NH2)(2)/2 LiH Composite[J]. chemsuschem,2013,6(11):2181-2189. |
| APA | Wang, Jianhui.,Chen, Ping.,Pan, Hongge.,Xiong, Zhitao.,Gao, Mingxia.,...&Wang, Jieru.(2013).Solid-Solid Heterogeneous Catalysis: The Role of Potassium in Promoting the Dehydrogenation of the Mg(NH2)(2)/2 LiH Composite.chemsuschem,6(11),2181-2189. |
| MLA | Wang, Jianhui,et al."Solid-Solid Heterogeneous Catalysis: The Role of Potassium in Promoting the Dehydrogenation of the Mg(NH2)(2)/2 LiH Composite".chemsuschem 6.11(2013):2181-2189. |
入库方式： OAI收割
来源：大连化学物理研究所
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