Citation

Sanz-Navarro, Carlos Federico and Lee, Siaw Foon and Yap, Seong Shan and Nee, Chen Hon and Yap, Seong Ling (2023) Electrochemical stability and corrosion mechanism of fluorine-doped tin oxide film under cathodic polarization in near neutral electrolyte. Thin Solid Films, 768. p. 139697. ISSN 0040-6090

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Abstract

Commercial fluorine-doped tin oxide (FTO) coated glass slides were subjected to different cathodic potentials for 15 min in 0.2 M Na2SO4 of pH 6.42 to study their electrochemical stability. Results showed that FTO could maintain its electrochemical stability until -1200 mV. However, when it was cathodically polarized from -1600 mV to more negative potentials, band structure positions started to shift upwards, the electrolyte became more acidic and a porous structure appeared on the FTO surface. At -2000 mV, a layer of metallic Sn was seen deposited on the FTO surface, verified by X-ray diffraction and scanning electron microscopy – energy dispersive X-ray spectroscopy. During the cathodic corrosion in near neutral electrolyte, the reduction of SnO2 to Sn involves water oxidation as well as hydrogen evolution reaction.

Item Type:	Article
Uncontrolled Keywords:	Fluorine-doped tin oxide, Electrochemical impedance spectroscopy, Mott–schottky analysis, Cathodic potential
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK9001-9401 Nuclear engineering. Atomic power
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	01 Mar 2023 06:03
Last Modified:	02 Mar 2023 06:18
URII:	http://shdl.mmu.edu.my/id/eprint/11174

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