Monolithic Nanoporous Copper with Novel Electrochemical Properties Fabricated by Dealloying Cu-Zr(-Al) Metallic Glasses

Abstract:

Monolithic uniform nanoporous Cu (NPC) ribbons with a ligament/pore size of 10-25 nm are successfully synthesized by chemical dealloying the Cu₅₀Zr₅₀ and Cu₅₀Zr₄₅Al₅ metallic glasses in 0.5 M HF for 7 min. It is found that the length scale of ligaments/channels can be tuned by simply alloying 5 at.% Al to the Cu-Zr binary glassy alloys. The current signal of the NPC-supported MnO₂ composite electrode is remarkably enhanced as compared to that of pure MnO₂ powders. These new findings greatly raise the hope for possible applications of NPC as a new type of electrode substrates or an advanced sensor in green and new energy technology.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 1925-1930
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.1925
• Online since: May 2014
• Authors: Chun Ling Qin*, Zhi Feng Wang, Hui Liu, Li Liu, Hao Wang, Jian Ding, Wei Min Zhao
• Keywords: Cyclic Voltammetry Curves, Dealloying, Metallic Glass, Nanoporous Copper

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