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题名: The Formation of Surface Lithium-Iron Ternary Hydride and its Function on Catalytic Ammonia Synthesis at Low Temperatures
作者: Wang, Peikun1, 2;  Xie, Hua1, 3;  Guo, Jianping1, 4;  Zhao, Zhi1, 3;  Kong, Xiangtao1, 2, 3;  Gao, Wenbo1, 2;  Chang, Fei1, 2;  He, Teng1;  Wu, Guotao1;  Chen, Mingshu5;  Jiang, Ling1, 3, 4;  Chen, Ping1, 4
关键词: ammonia synthesis ;  clusters ;  iron catalysts ;  Li4FeH6 ;  optical spectroscopy
刊名: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
发表日期: 2017-07-17
DOI: 10.1002/anie.201703695
卷: 56, 页:8716-8720
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Lithium hydride (LiH) has a strong effect on iron leading to an approximately 3 orders of magnitude increase in catalytic ammonia synthesis. The existence of lithium-iron ternary hydride species at the surface/interface of the catalyst were identified and characterized for the first time by gas-phase optical spectroscopy coupled with mass spectrometry and quantum chemical calculations. The ternary hydride species may serve as centers that readily activate and hydrogenate dinitrogen, forming Fe-(NH2)-Li and LiNH2 moieties-possibly through a redox reaction of dinitrogen and hydridic hydrogen (LiH) that is mediated by iron-showing distinct differences from ammonia formation mediated by conventional iron or ruthenium-based catalysts. Hydrogen-associated activation and conversion of dinitrogen are discussed.
关键词[WOS]: NITROGEN-FIXATION ;  TRANSITION-METAL ;  ALKALI-METAL ;  GAS ;  ACTIVATION ;  POTASSIUM ;  OXIDATION ;  CLUSTERS ;  STEPS ;  CYCLE
语种: 英语
WOS记录号: WOS:000405308500018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152078
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, Collaborat Innovat Ctr Chem Energy Mat, Dalian 116023, Peoples R China
5.Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

Recommended Citation:
Wang, Peikun,Xie, Hua,Guo, Jianping,et al. The Formation of Surface Lithium-Iron Ternary Hydride and its Function on Catalytic Ammonia Synthesis at Low Temperatures[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2017,56:8716-8720.
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