Superior catalytic effect of TiF(3) over TiCl(3) in improving the hydrogen sorption kinetics of MgH(2): Catalytic role of fluorine anion

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	Superior catalytic effect of TiF(3) over TiCl(3) in improving the hydrogen sorption kinetics of MgH(2): Catalytic role of fluorine anion
	L. P. Ma; X. D. Kang; H. B. Dai; Y. Liang; Z. Z. Fang; P. J. Wang; P. Wang; H. M. Cheng
	2009
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	57 期号:7 页码:2250-2258
摘要	TiF(3) shows a superior catalytic effect over TiCl(3) in improving the hydrogen sorption kinetics of MgH(2). Combined phase analyis and microstructure characterization suggest that both titanium halide additives react with host MgH(2) 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 TiF(3)-doped MgH(2). In contrast, only one stable binding state of Cl is identified in the form of MgCl(2) for the TiCl(3)-doped MgH(2). In combination with the designed experiments, these findings suggest that the generation of active F-containing species may be responsible for the advantage of TiF(3) over TiCl(3) in improving both the absorption and desorption kinetics of MgH(2). 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.
部门归属	[ma, l. -p.; kang, x. -d.; dai, h. -b.; liang, y.; fang, z. -z.; wang, p-j.; wang, p.; cheng, h. -m.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;wang, p (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;pingwang@imr.ac.cn
关键词	Hydrogen Storage Catalysis X-ray Photoelectron Spectroscopy Hydrides Storage Materials Complex Hydrides Composite Nb2o5 Performance Improvement Stability Mechanism Property Naalh4
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32182
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. P. Ma,X. D. Kang,H. B. Dai,et al. Superior catalytic effect of TiF(3) over TiCl(3) in improving the hydrogen sorption kinetics of MgH(2): Catalytic role of fluorine anion[J]. Acta Materialia,2009,57(7):2250-2258.
APA	L. P. Ma.,X. D. Kang.,H. B. Dai.,Y. Liang.,Z. Z. Fang.,...&H. M. Cheng.(2009).Superior catalytic effect of TiF(3) over TiCl(3) in improving the hydrogen sorption kinetics of MgH(2): Catalytic role of fluorine anion.Acta Materialia,57(7),2250-2258.
MLA	L. P. Ma,et al."Superior catalytic effect of TiF(3) over TiCl(3) in improving the hydrogen sorption kinetics of MgH(2): Catalytic role of fluorine anion".Acta Materialia 57.7(2009):2250-2258.