Comparison of Physical/Chemical Properties of Prussian Blue Thin Films Prepared by Different Pulse and DC Electrodeposition Methods

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Isfahani, VB (Author) Other; Arab, A (Author) Other; Belo, JH (Author) FCUP; araujo, j. p. (Author) FCUP; Silva, MM (Author) Other; Almeida, BG (Author) Other

Journal

Title: Materials

Vol. 9

Final page: 8857

ISSN: 1996-1944

Publisher: MDPI

Indexing

ISI Web of Knowledge - 3 Citations

Other information

Authenticus ID: P-00X-MZJ

DOI: 10.3390/ma15248857

Abstract (EN): 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 similar to 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 18