Transition and Alkali Metal Complex Ternary Amides for Ammonia Synthesis and Decomposition | |
Guo, Jianping5; Chang, Fei5; Pistidda, Claudio4; Zhou, Wei1; Zhang, Xilun5; Santoru, Antonio4; Wu, Hui1; Schell, Norbert2; Niewa, Rainer3; Chen, Ping5 | |
刊名 | CHEMISTRY-A EUROPEAN JOURNAL
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2017-07-21 | |
卷号 | 23期号:41页码:9766-9771 |
关键词 | ammonia decomposition ammonia synthesis ternary transition metal amide transition metal nitride |
英文摘要 | A new complex ternary amide, Rb-2[Mn(NH2)(4)], which simultaneously contains both transition and alkali metal catalytic sites, is developed. This is in line with the recently reported TM-LiH composite catalysts, which have been shown to effectively break the scaling relations and achieve ammonia synthesis under mild conditions. Rb-2[Mn(NH2)(4)] can be facilely synthesized by mechanochemical reaction at room temperature. It exhibits two temperature-dependent polymorphs, that is, a low-temperature orthorhombic and a high-temperature monoclinic structure. Rb-2[Mn(NH2)(4)] decomposes to N-2, H-2, NH3, Mn3N2, and RbNH2 under inert atmosphere; whereas it releases NH3 at a temperature as low as 80 degrees C under H-2 atmosphere. Those unique behaviors enable Rb-2[Mn(NH2)(4)], and its analogue K-2[Mn(NH2)(4)], to be excellent catalytic materials for ammonia decomposition and synthesis. Experimental results show both ammonia decomposition onset temperatures and conversion rates over Rb-2[Mn(NH2)(4)] and K-2[Mn(NH2)(4)] are similar to those of noble metal Ru-based catalysts. More importantly, these ternary amides exhibit superior capabilities in catalyzing NH3 synthesis, which are more than 3 orders of magnitude higher than that of Mn nitride and twice of that of Ru/MgO. The in situ SR-PXD measurement shows that manganese nitride, synergistic with Rb/KH or Rb/K(NH2)(x)H1-x, are likely the active sites. The chemistry of Rb-2/K-2[Mn(NH2)(x)] and Rb/K(NH2)(x)H1-x with H-2/N-2 and NH3 correlates closely with the catalytic performance. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Chemistry, Multidisciplinary |
研究领域[WOS] | Chemistry |
关键词[WOS] | HYDROGEN STORAGE MATERIALS ; AMMONOTHERMAL SYNTHESIS ; CATALYSIS ; NITROGEN ; NITRIDE ; IMIDES ; LINH2 ; RU |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000405923800013 |
内容类型 | 期刊论文 |
源URL | [http://cas-ir.dicp.ac.cn/handle/321008/151909] ![]() |
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.NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA 2.Helmholtz Zentrum Geesthacht, Inst Mat Sci, Notkestr 85, D-22607 Hamburg, Germany 3.Univ Stuttgart, Inst Inorgan Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany 4.Helmholtz Zentrum Geesthacht GmbH, Mat Technol, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany 5.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China |
推荐引用方式 GB/T 7714 | Guo, Jianping,Chang, Fei,Pistidda, Claudio,et al. Transition and Alkali Metal Complex Ternary Amides for Ammonia Synthesis and Decomposition[J]. CHEMISTRY-A EUROPEAN JOURNAL,2017,23(41):9766-9771. |
APA | Guo, Jianping.,Chang, Fei.,Pistidda, Claudio.,Zhou, Wei.,Zhang, Xilun.,...&Cao, Hujun.(2017).Transition and Alkali Metal Complex Ternary Amides for Ammonia Synthesis and Decomposition.CHEMISTRY-A EUROPEAN JOURNAL,23(41),9766-9771. |
MLA | Guo, Jianping,et al."Transition and Alkali Metal Complex Ternary Amides for Ammonia Synthesis and Decomposition".CHEMISTRY-A EUROPEAN JOURNAL 23.41(2017):9766-9771. |
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