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| Naji, M. |
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| Azevedo, Nuno Monteiro |
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Almeida, Bernardo Gonçalves
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- 2023XRD and FTIR analysis of Ti–Si–C–ON coatings for biomedical applications
- 2023Bioinspired Cyclic Dipeptide Functionalized Nanofibers for Thermal Sensing and Energy Harvestingcitations
- 2022Lead-Free MDABCO-NH4I3 Perovskite Crystals Embedded in Electrospun Nanofiberscitations
- 2022Comparison of physical/chemical properties of Prussian Blue thin films prepared by different pulse and DC electrodeposition methodscitations
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article
Comparison of physical/chemical properties of Prussian Blue thin films prepared by different pulse and DC electrodeposition methods
Abstract
Prussian Blue (PB) thin films were prepared by DC chronoamperometry (CHA), symmetric pulse, and non-symmetric pulse electrodeposition techniques. The formation of PB was confirmed by infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDX) and UV-Vis transmission measurements. X-ray diffraction (XRD) shows the stabilization of the insoluble form of PB. From scanning electron microscopy (SEM) studies, an increase in porosity is obtained for the shorter pulse widths, which tends to improve the total charge exchange and electrochemical stability of the films. While the film prepared by CHA suffered a degradation of 82% after 260 cycles, the degradation reduced to 24% and 34% for the samples prepared by the symmetric and non-symmetric pulse methods, respectively. Additionally, in the non-symmetric pulse film, the improvement in the charge exchange reached ~522% after 260 cycles. According to this study, the deposition time distribution affects the physical/chemical properties of PB films. These results then render pulse electrodeposition methods especially suitable to produce high-quality thin films for electrochemical devices, based on PB. ; This work was supported by the Portuguese Foundation for Science and Technology (FCT), through the projects POCI-01-0145-FEDER-029454, NORTE-01-0145-FEDER-028538, PTDC/NANMAT/0098/2020 and UID/QUI/0686/2020. It was also funded by the R&D project “SOLPOWINS”, with reference PTDC/CTM-REF/4304/2020, and E-Field- “Electric-Field Engineered Lattice Distortions (E-FiELD) for optoelectronic devices”, ref. PTDC/NAN-MAT/0098/2020, financed by the FCT.