light absorption and reflection;
hydrogen storage materials;
thin films;
D O I:
10.1016/j.jallcom.2004.11.127
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
The optical properties of Mg-TM (TM: Ni, Co, Fe; Mg:TM approximate to 2) thin films during hydrogenation are investigated using reflection and transmission measurements. Mg-Ni and Mg-Co show an unusual behavior upon exposure to hydrogen. The nucleation of the hydride starts at the film substrate interface and not - as intuitively expected - at the Pd covered top side of the film. Consequently, a double layer structure is formed. Reflection measurements are used to identify the loading behavior as the double layering yields to an remarkable optical black state at intermediate hydrogen concentrations. Photometric measurements on samples loaded at H-2-pressures of 10(5) Pa show that in Mg-NiHx and Mg-CoHx the complex hydrides Mg2NiH4 and Mg2COH5 are formed, whereas in Mg-Fe-x the formation of MgH2 is prevalent. (c) 2005 Elsevier B.V. All rights reserved.
机构:
Dept. of Mat. Sci. and Engineering, Univ. of Sci. and Technology Beijing, Beijing 100083, ChinaDept. of Mat. Sci. and Engineering, Univ. of Sci. and Technology Beijing, Beijing 100083, China
Du, Zhenmin
Liu, Hongying
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机构:
College of Engineering, China Agricultural University, Beijing 100083, ChinaDept. of Mat. Sci. and Engineering, Univ. of Sci. and Technology Beijing, Beijing 100083, China
Liu, Hongying
Ling, Gang
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机构:
College of Engineering, China Agricultural University, Beijing 100083, ChinaDept. of Mat. Sci. and Engineering, Univ. of Sci. and Technology Beijing, Beijing 100083, China
机构:
S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Griffith Univ, QMNC, Brisbane, Qld 4111, AustraliaS China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Cui, Jie
Liu, Jiangwen
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S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R ChinaS China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Liu, Jiangwen
Wang, Hui
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S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R ChinaS China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Wang, Hui
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机构:
Ouyang, Liuzhang
Sun, Dalin
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机构:
Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R ChinaS China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Sun, Dalin
Zhu, Min
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S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R ChinaS China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Zhu, Min
Yao, Xiangdong
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机构:
Griffith Univ, QMNC, Brisbane, Qld 4111, AustraliaS China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China