Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/70448| Título: | Galvanic oxidation of bimetallic Zn-Fe nanoparticles for oxygen scavenging |
| Autor(es): | Castro, A. Carvalho, I. Marques, L. Ferreira, P. J. Cavaleiro, A. Carvalho, S. Velasco, Sebastian Calderon |
| Palavras-chave: | Galvanic potential, STEM Moisture-activated Packaging Relative humidity |
| Data: | 30-Jan-2021 |
| Editora: | Elsevier |
| Revista: | Applied Surface Science |
| Resumo(s): | Bimetallic nanoparticles (NP) have demonstrated outstanding multifunctional characteristics, which depend on their size, distribution and composition. In this study, we show the possibility of tailoring the oxidation behavior of Zn-Fe bimetallic nanoparticles produced by magnetron sputtering and gas agglomeration system. Zn and Fe metals were coupled to promote faster oxidation of Zn, stimulating a galvanic mechanism due to the dissimilar corrosion potential in the nanoparticles. The results revealed Zn dissolution occurring at high humidity environments for bimetallic Zn-Fe nanoparticles where no intermix exists between Zn and Fe; however, such dissolution is excluded for ZnFe alloys. The effect of the galvanic couple on the Zn dissolution was confirmed by molecular dynamic simulations. This bimetallic system can be exploited as moisture-activated oxygen scavenger materials due to the acceleration in the oxidation mechanism. |
| Tipo: | Artigo |
| URI: | https://hdl.handle.net/1822/70448 |
| DOI: | 10.1016/j.apsusc.2020.147896 |
| ISSN: | 0169-4332 |
| Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0169433220326532#! |
| Arbitragem científica: | yes |
| Acesso: | Acesso aberto |
| Aparece nas coleções: | CDF - FCT - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
| Ficheiro | Descrição | Tamanho | Formato | |
|---|---|---|---|---|
| 1-s2.0-S0169433220326532-main.pdf | 15,13 MB | Adobe PDF | Ver/Abrir |
