TY - JOUR
T1 - Electrochemical properties of IrO2-Ti2O5-Co3O4 coated Ti anode in acid media
AU - Alanazi, Nayef M.
AU - Al-Abdulhadi, Abdullatif I.
AU - Al-Zharani, Talal Y.
AU - Al-Khaldi, Turki A.
AU - Alghamdi, Rasha A.
AU - Al-Shaikh Ali, Anaam H.
AU - Shen, Shouwen
N1 - KAUST Repository Item: Exported on 2021-03-31
Acknowledgements: Authors would like to thank Saudi Aramco management to give permission to publish this work. Also, they would like to thank KAUST University for the TEM analysis.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2019/9
Y1 - 2019/9
N2 - Iridium oxide-tantalum pentoxide (IrO2–Ta2O5) coated anodes were prepared by thermal decomposition on a tubular titanium substrate with and without cobalt salts containing a precursor. The surface morphology and microstructure of the deposited coatings were investigated by use of an environmental scanning electron microscope (ESEM), X-ray fluorescence (XRF) spectrometry and scanning transmission electron microscope (STEM). The electrochemical properties of the deposited thin coatings were examined by cyclic voltammetry, potentiodynamic polarization scan and electrochemical impedance spectroscopy (EIS) techniques. The service life cycle of the applied coatings was evaluated under electrolysis at a constant current density of 1 A cm−2 in 1 M sulfuric acid (H2SO4) solution. The role of cobalt oxide (Co3O4) in the electrocatalytic activity and stability of IrO2–Ta2O5 coating are discussed. A small amount of Co3O4 resulted in improving the life cycle of the IrO2-Ta2O5 anode in the 1 M H2SO4 solution due to dense nature coating. Meanwhile, the Co3O4 had no significant contribution to the electrochemical measurements.
AB - Iridium oxide-tantalum pentoxide (IrO2–Ta2O5) coated anodes were prepared by thermal decomposition on a tubular titanium substrate with and without cobalt salts containing a precursor. The surface morphology and microstructure of the deposited coatings were investigated by use of an environmental scanning electron microscope (ESEM), X-ray fluorescence (XRF) spectrometry and scanning transmission electron microscope (STEM). The electrochemical properties of the deposited thin coatings were examined by cyclic voltammetry, potentiodynamic polarization scan and electrochemical impedance spectroscopy (EIS) techniques. The service life cycle of the applied coatings was evaluated under electrolysis at a constant current density of 1 A cm−2 in 1 M sulfuric acid (H2SO4) solution. The role of cobalt oxide (Co3O4) in the electrocatalytic activity and stability of IrO2–Ta2O5 coating are discussed. A small amount of Co3O4 resulted in improving the life cycle of the IrO2-Ta2O5 anode in the 1 M H2SO4 solution due to dense nature coating. Meanwhile, the Co3O4 had no significant contribution to the electrochemical measurements.
UR - http://hdl.handle.net/10754/668391
UR - https://linkinghub.elsevier.com/retrieve/pii/S0257897219306826
UR - http://www.scopus.com/inward/record.url?scp=85067871610&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2019.06.059
DO - 10.1016/j.surfcoat.2019.06.059
M3 - Article
SN - 0257-8972
VL - 374
SP - 815
EP - 821
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -