Review of Fabrication Methods, Physical Properties, and Applications of Nanostructured Copper Oxides Formed via Electrochemical Oxidation

Nanomaterials
Wojciech J Stepniowski, Wojciech Z Misiolek

Abstract

Typically, anodic oxidation of metals results in the formation of hexagonally arranged nanoporous or nanotubular oxide, with a specific oxidation state of the transition metal. Recently, the majority of transition metals have been anodized; however, the formation of copper oxides by electrochemical oxidation is yet unexplored and offers numerous, unique properties and applications. Nanowires formed by copper electrochemical oxidation are crystalline and composed of cuprous (CuO) or cupric oxide (Cu₂O), bringing varied physical and chemical properties to the nanostructured morphology and different band gaps: 1.44 and 2.22 eV, respectively. According to its Pourbaix (potential-pH) diagram, the passivity of copper occurs at ambient and alkaline pH. In order to grow oxide nanostructures on copper, alkaline electrolytes like NaOH and KOH are used. To date, no systemic study has yet been reported on the influence of the operating conditions, such as the type of electrolyte, its temperature, and applied potential, on the morphology of the grown nanostructures. However, the numerous reports gathered in this paper will provide a certain view on the matter. After passivation, the formed nanostructures can be also post-treated. Post-treat...Continue Reading

References

Jul 21, 2006·The Journal of Physical Chemistry. B·Xufeng WuGaoquan Shi
Mar 19, 2009·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Anil Chandra AttaluriWojciech Misiolek
Aug 19, 2010·Advanced Materials·Kevin P MusselmanLukas Schmidt-Mende
Oct 24, 2012·ACS Applied Materials & Interfaces·Zhongjun ChengKening Sun
Jan 28, 2015·ACS Applied Materials & Interfaces·Cheryl Suwen LawDusan Losic
Oct 28, 2015·Nano Letters·Nathan T NesbittMichael J Naughton
Apr 16, 2017·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Marcin PisarekMaria Janik-Czachor
Feb 21, 2018·Nanomaterials·Yu-Chin Chien, Huei Chu Weng

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