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题名: Influence of alkali metal amides on the catalytic activity of manganese nitride for ammonia decomposition
作者: Chang, Fei1, 2;  Guo, Jianping1;  Wu, Guotao1;  Wang, Peikun1, 2;  Yu, Pei1, 2;  Chen, Ping1, 3, 4
关键词: Alkali metal amide ;  Manganese nitride ;  Electronic promotion ;  Ammonia decomposition
刊名: CATALYSIS TODAY
发表日期: 2017-05-15
DOI: 10.1016/j.cattod.2016.09.010
卷: 286, 页:141-146
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Strong promoting effect of alkali metal amides, i.e., LiNH2, NaNH2 and KNH2, on the catalytic activity of manganese nitride (MnN) for ammonia decomposition has been demonstrated, which is evidenced by ca. 100 K drop in onset temperature and by ca. 50-60 kJ mol(-1) reduction in apparent activation energy as compared with the neat MnN. The order of promotion capability of alkali metal amides can be ranked as LiNH2 > KNH2 >= NaNH2, either in term of NH3 conversion rate or turnover frequency (TOF), which is distinctly different from that of conventional alkali metal oxides or hydroxides, i.e., K > Na > Li. This phenomenon suggests that the promoting mechanism of alkalis depends on their chemical forms. When alkalis are in the form of amide or imide, they may function as co-catalysts by participating in the catalytic circle directly rather than by executing electronic promotion influence on transition metals. (C) 2016 Elsevier B.V. All rights reserved.
关键词[WOS]: COX-FREE HYDROGEN ;  NH3 DECOMPOSITION ;  HETEROGENEOUS CATALYSIS ;  BIMETALLIC CATALYSTS ;  LITHIUM IMIDE ;  SODIUM AMIDE ;  RU ;  GENERATION ;  PROMOTER ;  KINETICS
语种: 英语
WOS记录号: WOS:000399005400016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150344
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 Catalysis, Dalian 116023, Peoples R China
4.Collaborat Innovat Ctr Chem Energy Mat, Dalian 116023, Peoples R China

Recommended Citation:
Chang, Fei,Guo, Jianping,Wu, Guotao,et al. Influence of alkali metal amides on the catalytic activity of manganese nitride for ammonia decomposition[J]. CATALYSIS TODAY,2017,286:141-146.
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