Breaking scaling relations to achieve low-temperature ammonia synthesis through LiH-mediated nitrogen transfer and hydrogenation | |
Wang, Peikun1,2; Chang, Fei1,2; Gao, Wenbo1,2; Guo, Jianping1; Wu, Guotao1; He, Teng1; Chen, Ping1,3,4 | |
刊名 | NATURE CHEMISTRY |
2017 | |
卷号 | 9期号:1页码:64-70 |
ISSN号 | 1755-4330 |
DOI | 10.1038/NCHEM.2595 |
文献子类 | Article |
英文摘要 | Ammonia synthesis under mild conditions is a goal that has been long sought after. Previous investigations have shown that adsorption and transition-state energies of intermediates in this process on transition metals (TMs) scale with each other. This prevents the independent optimization of these energies that would result in the ideal catalyst: one that activates reactants well, but binds intermediates relatively weakly. Here we demonstrate that these scaling relations can be broken by intervening in the TM-mediated catalysis with a second catalytic site, LiH. The negatively charged hydrogen atoms of LiH act as strong reducing agents, which remove activated nitrogen atoms from the TM or its nitride (TMN), and as an immediate source of hydrogen, which binds nitrogen atoms to form LiNH2. LiNH2 further splits H-2 heterolytically to give off NH3 and regenerate LiH. This synergy between TM (or TMN) and LiH creates a favourable pathway that allows both early and late 3d TM-LiH composites to exhibit unprecedented lower-temperature catalytic activities. |
WOS关键词 | BIMETALLIC NITRIDE CATALYSTS ; DINITROGEN CLEAVAGE ; RUTHENIUM CATALYSTS ; LITHIUM HYDRIDE ; METAL NITRIDES ; REDUCTION ; COMPLEX ; MECHANISM ; KINETICS ; DECOMPOSITION |
WOS研究方向 | Chemistry |
语种 | 英语 |
出版者 | NATURE PUBLISHING GROUP |
WOS记录号 | WOS:000394540400014 |
内容类型 | 期刊论文 |
源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169652] |
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 | Guo, Jianping; Chen, Ping |
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 Catalysis, Dalian 116023, Peoples R China 4.Collaborat Innovat Ctr Chem Energy Mat, Dalian 116023, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Peikun,Chang, Fei,Gao, Wenbo,et al. Breaking scaling relations to achieve low-temperature ammonia synthesis through LiH-mediated nitrogen transfer and hydrogenation[J]. NATURE CHEMISTRY,2017,9(1):64-70. |
APA | Wang, Peikun.,Chang, Fei.,Gao, Wenbo.,Guo, Jianping.,Wu, Guotao.,...&Chen, Ping.(2017).Breaking scaling relations to achieve low-temperature ammonia synthesis through LiH-mediated nitrogen transfer and hydrogenation.NATURE CHEMISTRY,9(1),64-70. |
MLA | Wang, Peikun,et al."Breaking scaling relations to achieve low-temperature ammonia synthesis through LiH-mediated nitrogen transfer and hydrogenation".NATURE CHEMISTRY 9.1(2017):64-70. |
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