Ammonia Decomposition with Manganese Nitride-Calcium Imide Composites as Efficient Catalysts

doi:10.1002/cssc.201501498

	Ammonia Decomposition with Manganese Nitride-Calcium Imide Composites as Efficient Catalysts
	Yu, Pei 1,2; Guo, Jianping 1; Liu, Lin 1; Wang, Peikun 1,2; Wu, Guotao 1; Chang, Fei 1,2; Chen, Ping 1,3,4
刊名	CHEMSUSCHEM
	2016-02-19
卷号	9 期号:4 页码:364-369
关键词	Ammonia Calcium Heterogeneous Catalysis Manganese Nitrides
ISSN号	1864-5631
DOI	10.1002/cssc.201501498
文献子类	Article
英文摘要	Ammonia has high gravimetric and volumetric hydrogen densities and is, therefore, considered a promising carrier for the production of COx-free molecular H-2 for forthcoming energy systems. Alkaline earth metals are generally regarded as structural promoters of catalysts and employed in numerous catalytic processes. Here, we report that calcium imide (CaNH) has a strong synergistic effect on Mn6N5 in catalyzing the decomposition of NH3, leading to a ca. 40% drop in apparent activation energy. At 773K, the H-2 formation rate over a Mn6N5-11CaNH composite catalyst is about an order of magnitude higher than that of Mn6N5 and comparable to the highly active Ni/SBA-15 and Ru/Al2O3 catalysts. Analysis by means of temperature-programmed decomposition (TPD), X-ray diffraction (XRD), and X-ray absorption near edge spectroscopy (XANES) reveal that CaNH participates in the catalysis via forming a [Ca6MnN5]-like intermediate, thus altering the reaction pathway and energetics. A two-step catalytic cycle, accounting for the synergy between CaNH and Mn6N5, is proposed.
WOS关键词	COX-FREE HYDROGEN ; FUEL-CELL APPLICATIONS ; X-RAY-DIFFRACTION ; N-H SYSTEM ; CRYSTAL-STRUCTURE ; METAL NITRIDES ; GENERATION ; RU ; NANOPARTICLES ; RUTHENIUM
WOS研究方向	Chemistry
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000371222100006
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/171048]
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	Chen, Ping
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, 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.Chinese Acad Sci, Dalian Inst Chem Phys, Collaborat Innovat Ctr Chem Energy Mat, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Yu, Pei,Guo, Jianping,Liu, Lin,et al. Ammonia Decomposition with Manganese Nitride-Calcium Imide Composites as Efficient Catalysts[J]. CHEMSUSCHEM,2016,9(4):364-369.
APA	Yu, Pei.,Guo, Jianping.,Liu, Lin.,Wang, Peikun.,Wu, Guotao.,...&Chen, Ping.(2016).Ammonia Decomposition with Manganese Nitride-Calcium Imide Composites as Efficient Catalysts.CHEMSUSCHEM,9(4),364-369.
MLA	Yu, Pei,et al."Ammonia Decomposition with Manganese Nitride-Calcium Imide Composites as Efficient Catalysts".CHEMSUSCHEM 9.4(2016):364-369.