The microstructural dependence of ionic transport in bi-continuous nanoporous metal

doi:10.1016/j.actamat.2024.120134

IMR OpenIR

	The microstructural dependence of ionic transport in bi-continuous nanoporous metal
	Wang, Congcheng 1,2; Tsang, Anson 1,3; Sang, Yingji 1,2; Xiao, Diwen 1,2; Xu, Yuan 1,2; Yang, Shida 1,4; Liu, Ling-Zhi 5; Zheng, Qiang 6,7; Liu, Pan 6,7; Jin, Hai -Jun 5; Chen, Qing 1,2,4
通讯作者	Chen, Qing(chenqing@ust.hk)
	2024-09-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	276 页码:9
摘要	Ionic transport in electrolyte-imbibing nanopores is considered a common bottleneck in the functional applications of bi-continuous nanoporous (NP) metals, which in turn offer a unique opportunity to understand structure-transport relationships at nanoscales. By dealloying an Ag-Au alloy and isothermal coarsening, we can control the pore size of NP Au in the range of 13 nm to 2.4 mu m and the porosity between 38 % and 69 %. By reduction-induced decomposition of AgCl, we can further control the structural hierarchy and the pore orientation of NP Ag. In these NP metals, we measure the effective conductivities of 1 M NaClO4 to range from 7 % to 44 % of that of a free solution. The tortuosity of NP Au displays weak dependences on both the pore size and the porosity, consistent with the observed self-similarity in coarsening, except for those of pores narrower than 25 nm, which we consider deviating from the well-coarsened pore geometry. For NP Ag, rapid transport is observed for the hierarchical and the oriented structures; the former can be explained with the Maxwell-Garnett equation and the latter underlines random orientations as the common cause of slow transport. We then demonstrate the practical significance of the structure-transport relationship in the application of NP Ag in CO2 reduction.
关键词	Nanoporous metal Ion transport Dealloying Self -similarity Size effect
资助者	National Foundation of Natural Science, China ; Research Grant Council of the Hong Kong SAR, China
DOI	10.1016/j.actamat.2024.120134
收录类别	SCI
语种	英语
资助项目	National Foundation of Natural Science, China[52022002] ; Research Grant Council of the Hong Kong SAR, China[16208220]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001261189200001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：5[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/321006/187772
专题	中国科学院金属研究所
通讯作者	Chen, Qing
作者单位	1.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China 2.Hong Kong Univ Sci & Technol, Energy Inst, Kowloon, Clear Water Bay, Hong Kong, Peoples R China 3.Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA USA 4.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Clear Water Bay, Hong Kong, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China 6.Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai, Peoples R China 7.Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv High Temp Mat & Precis Formin, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Wang, Congcheng,Tsang, Anson,Sang, Yingji,et al. The microstructural dependence of ionic transport in bi-continuous nanoporous metal[J]. ACTA MATERIALIA,2024,276:9.
APA	Wang, Congcheng.,Tsang, Anson.,Sang, Yingji.,Xiao, Diwen.,Xu, Yuan.,...&Chen, Qing.(2024).The microstructural dependence of ionic transport in bi-continuous nanoporous metal.ACTA MATERIALIA,276,9.
MLA	Wang, Congcheng,et al."The microstructural dependence of ionic transport in bi-continuous nanoporous metal".ACTA MATERIALIA 276(2024):9.