Transition metal tungstates AWO4 (A2+  = Fe, Co, Ni, and Cu) thin films and their photoelectrochemical behavior as photoanode for photocatalytic applications

This paper discusses about a facile transition metal tungstate thin films preparation method and their remarkable photoelectrochemical properties. The films of A WO 4 ( A 2+  = Fe, Co, Ni, Cu) were deposited onto conductive fluorine-doped tin oxide (FTO) glass substrate. The results of X-ray diffrac...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2023-07, Vol.53 (7), p.1349-1367
Main Authors: Costa, Maria Joseíta dos Santos, Lima, Aline Estefany Brandão, Ribeiro, Ester Pamponet, Costa, Gilson dos Santos, Longo, Elson, da Luz, Geraldo Eduardo, Cavalcante, Laecio Santos, Santos, Reginaldo da Silva
Format: Article
Language:English
Subjects:
Chemical composition
Chemistry
Chemistry and Materials Science
Cobalt
Copper
Electrochemistry
Emission analysis
Field emission microscopy
Fluorine
Glass substrates
Industrial Chemistry/Chemical Engineering
Iron
Nanostructured materials
Nickel
Photoanodes
Photoelectrochemical devices
Photoelectrons
Physical Chemistry
Research Article
Thin films
Tin oxides
Transition metals
Tungstates
Water splitting
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Summary:This paper discusses about a facile transition metal tungstate thin films preparation method and their remarkable photoelectrochemical properties. The films of A WO 4 ( A 2+  = Fe, Co, Ni, Cu) were deposited onto conductive fluorine-doped tin oxide (FTO) glass substrate. The results of X-ray diffraction analysis indicated the presence of crystalline films. Field emission scanning electron microscopy images revealed nanostructured materials. X-ray photoelectron studies were employed to analyze elemental and chemical composition. Optical behavior indicated indirect transitions for all A WO 4 films. Photoelectrochemical studies displayed that A WO 4 films were successfully used as photoanodes in a photoelectrochemical cell under polychromatic irradiation. From electrochemical measurement, it was possible to estimate the flat band potential and so prevising suitable application of photoelectrodes. This work reports for the first time a comparative and comprehensive photoelectrochemical study with A WO 4 films prepared in a simple way. The results indicate that the films can be used as photoanodes in water splitting reactions and other photoelectrocatalytic applications. Graphical Abstract
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-023-01851-w