Express penetration of hydrogen on Mg(10(1)over-bar3) along the close-packed-planes

标题

Express penetration of hydrogen on Mg(10(1)over-bar3) along the close-packed-planes

作者

作者:Ouyang, LZ (Ouyang, Liuzhang)^[1,4 ]; Tang, JJ (Tang, Jiajun)^[1,2,4 ]; Zhao, YJ (Zhao, Yujun)^[2,4 ]; Wang, H (Wang, Hui)^[1,4 ]; Yao, XD (Yao, Xiangdong)^[3 ]; Liu, JW (Liu, Jiangwen)^[1,4 ]; Zou, J (Zou, Jin)^[5,6 ]; Zhu, M (Zhu, Min)^[1,4 ]

期刊信息

摘要

Metal atoms often locate in energetically favorite close-packed planes, leading to a relatively high penetration barrier for other atoms. Naturally, the penetration would be much easier through non-close-packed planes, i.e. high-index planes. Hydrogen penetration from surface to the bulk (or reversely) across the packed planes is the key step for hydrogen diffusion, thus influences significantly hydrogen sorption behaviors. In this paper, we report a successful synthesis of Mg films in preferential orientations with both close-and non-close-packed planes, i.e. (0001) and a mix of (0001) and (10 (1) over bar3), by controlling the magnetron sputtering conditions. Experimental investigations confirmed a remarkable decrease in the hydrogen absorption temperature in the Mg (10 (1) over bar3), down to 392 K from 592 K of the Mg film (0001), determined by the pressure-composition-isothermal (PCI) measurement. The ab initio calculations reveal that non-close-packed Mg(10 (1) over bar3) slab is advantageous for hydrogen sorption, attributing to the tilted close-packed-planes in the Mg(10 (1) over bar3) slab.

关键词

KeyWords Plus:SINGLE-CRYSTAL SURFACES; THIN-FILMS; ENERGY; 1ST-PRINCIPLE; ADSORPTION; DIFFUSION; POINTS; METALS

作者信息

作者信息

通讯作者地址:Yao, XD (通讯作者)

Griffith Univ, Sch Biomol & Phys Sci, Nathan, Qld 4111, Australia.   增强组织信息的名称     Griffith University

地址:

	[ 1 ] S China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 2 ] S China Univ Technol, Dept Phys, Guangzhou 510640, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 3 ] Griffith Univ, Sch Biomol & Phys Sci, Nathan, Qld 4111, Australia   增强组织信息的名称     Griffith University
	[ 4 ] S China Univ Technol, China Australia Joint Lab Energy & Environm Mat, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 5 ] Univ Queensland, Mat Engn, St Lucia, Qld 4072, Australia   增强组织信息的名称     University of Queensland
	[ 6 ] Univ Queensland, Ctr Microscopy & Microanal, St Lucia, Qld 4072, Australia   增强组织信息的名称     University of Queensland

电子邮件地址:x.yao@griffith.edu.au; memzhu@scut.edu.cn

出版商

NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND

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