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题名: XPS study on Mg0.9-xTi0.1PdxNi (x=0.04, 0.06, 0.08, 0.1) hydrogen storage electrode alloys after charge-discharge cycles
作者: Tian, Qifeng1, 2, 4;  Zhang, Yao3;  Wu, Yuanxin1, 2
关键词: Hydrogen storage electrode alloys ;  X-ray photoelectron spectroscopy (XPS) ;  Passive films ;  Mechanisms
刊名: JOURNAL OF ALLOYS AND COMPOUNDS
发表日期: 2009-09-18
DOI: 10.1016/j.jallcom.2009.05.038
卷: 484, 期:1-2, 页:763-771
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary ;  Metallurgy & Metallurgical Engineering
研究领域[WOS]: Chemistry ;  Materials Science ;  Metallurgy & Metallurgical Engineering
英文摘要: The passive film composition of Mg0.9-xTi0.1PdxNi (x = 0.04, 0.06, 0.08, 0.1) hydrogen storage alloys after 40 charge-discharge cycles has been investigated by means of X-ray photoelectron spectroscopy (XPS) in combination with Ar+ sputtering technology. With the XPSPEAK software, high resolution spectra of alloy elements and oxygen were deconvolved into individual peaks. Composites formed by metal elements and their relative contents were also deduced. It was found that the composites originated from Mg and Ni were mainly in the form of their oxides and hydroxides, which existed at the top surface of alloys. With the increase of sputtering depth, the hydroxides of Mg and Ni gradually disappeared while corresponding oxides dominated their passive products. According to the analysis results of oxygen spectra, the elemental segregation of Mg and Ni was influenced by the substitution of Pd because the addition of Pd slightly enhanced the surface energy of the alloys and suppressed the formation of Mg hydroxide and oxide. Ti and Pd presented multiple-oxides from the surface to the inner alloys and metallic Pd appeared in the sub-layers of the alloys' surface. The possible mechanisms of the formation of passive products were suggested on the basis of the discussion in the paper. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
关键词[WOS]: METAL HYDRIDE BATTERIES ;  ELECTROCHEMICAL PROPERTIES ;  MGNI ALLOY ;  PARTIAL SUBSTITUTION ;  NI-ALLOY ;  TI ;  DEGRADATION ;  SURFACE ;  TERNARY ;  ZR
语种: 英语
WOS记录号: WOS:000271334900145
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141360
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.Wuhan Inst Technol, Minist Educ, Key Lab Green Chem Proc, Wuhan 430073, Hubei, Peoples R China
2.Wuhan Inst Technol, Hubei Key Lab Novel Reactor & Green Chem Technol, Wuhan 430073, Hubei, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
4.Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada

Recommended Citation:
Tian, Qifeng,Zhang, Yao,Wu, Yuanxin. XPS study on Mg0.9-xTi0.1PdxNi (x=0.04, 0.06, 0.08, 0.1) hydrogen storage electrode alloys after charge-discharge cycles[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2009,484(1-2):763-771.
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