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Zhao T, Li S, Zhu Y, Qiu J, Macdonald DD. Examination of the Passivity and Passivity Breakdown of OFP Copper in Simulated Geological Saline Solution, Effect of Sulfate. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Zhang B, Chen B, Wu J, Hao S, Yang G, Cao X, Jing L, Zhu M, Tsang SH, Teo EHT, Huang Y. The Electrochemical Response of Single Crystalline Copper Nanowires to Atmospheric Air and Aqueous Solution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603411. [PMID: 28026122 DOI: 10.1002/smll.201603411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 11/24/2016] [Indexed: 06/06/2023]
Abstract
In this paper, single crystalline copper nanowires (CuNWs) have been electrochemically grown through anodic aluminum oxide template. The environmental stability of the as-obtained CuNWs in both 40% relative humidity (RH) atmosphere and 0.1 m NaOH aqueous solution has been subsequently studied. In 40% RH atmosphere, a uniform compact Cu2 O layer is formed as a function of exposure time following the logarithmic law and epitaxially covers the CuNW surfaces. It is also found that the oxide layers on CuNWs are sequentially grown when subjected to the cyclic voltammetry measurement in 0.1 m NaOH solution. An epitaxially homogeneous Cu2 O layer is initially formed over the surface of the CuNW substrates by solid-state reaction (SSR). Subsequently, the conversion of Cu2 O into epitaxial CuO based on the SSR takes place with the increase of applied potential. This CuO layer is partially dissolved in the solution forming Cu(OH)2 , which then redeposited on the CuNW surfaces (i.e., dissolution-redeposition (DR) process) giving rise to a mixed polycrystalline CuO/Cu(OH)2 layer. The further increase of applied potential allows the complete oxidation of Cu2 O into CuO to form a dual-layer structure (i.e., CuO inner layer and Cu(OH)2 outer layer) with random orientations through an enhanced DR process.
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Affiliation(s)
- Bowei Zhang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Bensong Chen
- Temasek Laboratories, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Junsheng Wu
- Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Shiji Hao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
- Interdisciplinary Graduate School, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Guang Yang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
- Interdisciplinary Graduate School, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Xun Cao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Lin Jing
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Minmin Zhu
- School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Siu Hon Tsang
- Temasek Laboratories, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Edwin Hang Tong Teo
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
- School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Yizhong Huang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
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Lousada CM, Johansson AJ, Korzhavyi PA. Molecular and dissociative adsorption of water and hydrogen sulfide at perfect and defective Cu(110) surfaces. Phys Chem Chem Phys 2017; 19:8111-8120. [DOI: 10.1039/c6cp07732c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The adsorption of H2O and H2S onto Cu(110) surfaces lead to considerably different geometries and surface reconstruction and relaxation mechanisms.
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Affiliation(s)
- Cláudio M. Lousada
- Division of Materials Technology
- Department of Materials Science and Engineering
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
| | | | - Pavel A. Korzhavyi
- Division of Materials Technology
- Department of Materials Science and Engineering
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
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