Superior catalytic effect of TiF3 over TiCl3 in improving the hydrogen sorption kinetics of MgH2: Catalytic role of fluorine anion

doi:10.1016/j.actamat.2009.01.025

IMR OpenIR

	Superior catalytic effect of TiF3 over TiCl3 in improving the hydrogen sorption kinetics of MgH2: Catalytic role of fluorine anion
	Ma, L. -P.; Kang, X. -D.; Dai, H. -B.; Liang, Y.; Fang, Z. -Z.; Wang, P-J.; Wang, P.; Cheng, H. -M.
通讯作者	Wang, P.(pingwang@imr.ac.cn)
	2009-04-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	57 期号:7 页码:2250-2258
摘要	TiF3 shows a superior catalytic effect over TiCl3 in improving the hydrogen sorption kinetics of MgH2. Combined phase analyis and microstructure characterization suggest that both titanium halide additives react with host MgH2 in a similar way. However, systematic X-ray photoelectron spectroscopy studies reveal that the incorporated fluorine (F) differs significantly from its analog chlorine (Cl) in terms or bonding state. The asymmetry of F ls spectra and the sputtering-induced peak shift suggest that, in addition to the Mg F bond, a new Ti F Mg bonding is formed in the TiF3-doped MgH2. In contrast, only one stable binding state of Cl is identified in the form of MgCl2 for the TiCl3-doped MgH2. In combination with the designed experiments, these findings suggest that the generation of active F-containing species may be responsible for the advantage of TiF3 over TiCl3 in improving both the absorption and desorption kinetics of MgH2. Fundamentally. A emphasizes the functionality of F anion in tuning the activity of compound catalyst. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Hydrogen storage Catalysis X-ray photoelectron spectroscopy Hydrides
资助者	Hundred Talents Project of Chinese Academy of Sciences
DOI	10.1016/j.actamat.2009.01.025
收录类别	SCI
语种	英语
资助项目	Hundred Talents Project of Chinese Academy of Sciences
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000264998000020
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：157[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/118090
专题	中国科学院金属研究所
通讯作者	Wang, P.
作者单位	Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ma, L. -P.,Kang, X. -D.,Dai, H. -B.,et al. Superior catalytic effect of TiF3 over TiCl3 in improving the hydrogen sorption kinetics of MgH2: Catalytic role of fluorine anion[J]. ACTA MATERIALIA,2009,57(7):2250-2258.
APA	Ma, L. -P..,Kang, X. -D..,Dai, H. -B..,Liang, Y..,Fang, Z. -Z..,...&Cheng, H. -M..(2009).Superior catalytic effect of TiF3 over TiCl3 in improving the hydrogen sorption kinetics of MgH2: Catalytic role of fluorine anion.ACTA MATERIALIA,57(7),2250-2258.
MLA	Ma, L. -P.,et al."Superior catalytic effect of TiF3 over TiCl3 in improving the hydrogen sorption kinetics of MgH2: Catalytic role of fluorine anion".ACTA MATERIALIA 57.7(2009):2250-2258.