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Title: | Use of pyrophosphate and boric acid additives in the copper-zinc alloy electrodeposition and chemical dealloying | Authors: | VIVEGNIS, Sebastien Krid, M. Delhalle, J. Mekhalif, Z. RENNER, Frank |
Issue Date: | 2019 | Publisher: | ELSEVIER SCIENCE SA | Source: | JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 848 (Art N° 113310) | Abstract: | Over the last decade, nanoporous metals have attracted a growing attention due to the combination of structural and functional properties, such as their very high surface to volume ratio and mechanical rigidity. A recent and versatile process producing nanoporous metals is the dealloying of an initial alloy, i.e. the selective dissolution of the more reactive element of the alloy. In this work, we report on a method of CuZn alloy formation, without the use of furnaces or expensive techniques, and its subsequent chemical dealloying leading to nanoporous copper. Co-electrodeposition of CuZn alloys on a copper substrate is performed using pyrophosphate as a complexing agent in presence of boric acid, copper sulfate and zinc sulfate. The electrochemical behavior of this system is characterized by cyclic voltammetry, showing that a copper-zinc alloy is formed at -1.5 V vs. SCE. Cauliflower-like Zn-rich gamma-brass and epsilon-brass coatings are obtained by co-electrodeposition. The thickness, the structure and the composition of the electrodeposited alloy can be tuned by varying the electrodeposition conditions. Thicker and rougher coatings with a higher zinc content are formed at more cathodic conditions. The electrodeposited CuZn coatings were chemically dealloyed, and a two-step dealloying protocol leads to open framework nanoporous copper templates, which are a material of interest for energy storage, biosensors, and catalysis applications. (C) 2019 Published by Elsevier B.V. | Notes: | Mekhalif, Z (reprint author), Univ Namur, NISM, Lab Chem & Electrochem Surfaces CES, 61 Rue Bruxelles, B-5000 Namur, Belgium.; Renner, FU (reprint author), Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. zineb.mekhalif@unamur.be; frank.renner@uhasselt.be |
Other: | Mekhalif, Z (reprint author), Univ Namur, NISM, Lab Chem & Electrochem Surfaces CES, 61 Rue Bruxelles, B-5000 Namur, Belgium. Renner, FU (reprint author), Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. zineb.mekhalif@unamur.be; frank.renner@uhasselt.be | Keywords: | CuZn electrodeposition;Two-step chemical dealloying;Nanostructured copper | Document URI: | http://hdl.handle.net/1942/30861 | ISSN: | 1572-6657 | e-ISSN: | 1873-2569 | DOI: | 10.1016/j.jelechem.2019.113310 | ISI #: | WOS:000504505400063 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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vivegnes.pdf Restricted Access | Published version | 1.6 MB | Adobe PDF | View/Open Request a copy |
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