Fabrication and functionalization of tunable nanoporous copper structures by hybrid laser deposition and chemical dealloying

Changsheng Dong, Minlin Zhong, Lin Li, Ting Huang, Mingxing Ma

研究成果: ジャーナルへの寄稿学術論文査読

10 被引用数 (Scopus)

抄録

Nanoporous metals exhibit promising potentials for engineering applications in catalysis, sensing and bio-detection due to their large surface-to-volume ratios and excellent thermal and electrical conductivity. In this paper, a hybrid laser deposition and chemical dealloying technique is presented for producing tunable nanoporous structures on a substrate, with a particular focus on the etching process behaviour. It was pointed out that the dealloying conditions were crucial to the formation of nanoporosity structures. Nanopore sizes can be tunable from 40 nm-160 nm by controlling the dealloying conditions, such as electrolyte, concentration, time, temperature and alloy components. The nanoporous Cu structures were further functionalized by oxidation. XRD and XPS analyses demonstrated that the formation of Cu 2O on the surface of nanoporous copper prohibits the conventional oxidation to form CuO on the surface of the micro or bulk copper. This unique nanostructure exhibits excellent catalysis function for converting CO to CO 2 gas; its transition temperature decreases with the smaller nanoporous sizes.

本文言語英語
ページ(範囲)204-213
ページ数10
ジャーナルScience of Advanced Materials
4
2
DOI
出版ステータス出版済み - 2012 2月

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