TY - JOUR
T1 - Electrochemical properties of the IrO2-Ta2O5 coated anodes with Al/Ti and Cu/Ti layered composites substrates
AU - Han, Zhaohui
AU - Zhu, Peixian
AU - Xu, Lei
AU - Kannan, Chandrasekar Srinivasa
AU - Guo, Shenghui
AU - Liu, Jianhua
AU - Koppala, Sivasankar
AU - Ju, Shaohua
N1 - Funding Information:
This work was financially supported by the National Natural Science Foundation of China (Grant No. 51264025 and 51074082); Yunnan Science and Technology Major Project (Grant No. 2018ZE008 and 2018ZE027); and by Scientific Research Fund of Kunming University of Science and Technology (Grant Nos. KKZ3201752046).
Funding Information:
This work was financially supported by the National Natural Science Foundation of China (Grant No. 51264025 and 51074082 ); Yunnan Science and Technology Major Project (Grant No. 2018ZE008 and 2018ZE027 ); and by Scientific Research Fund of Kunming University of Science and Technology (Grant Nos. KKZ3201752046 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/11/15
Y1 - 2018/11/15
N2 - In this paper, the Al/Ti and Cu/Ti layered composite was prepared by the hot-pressing-bonding technique as the basic material of the anodes, and the IrO2-Ta2O5 coatings were thermally deposited on the different kinds of the matrix. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS) were used to study the Al/Ti and Cu/Ti layered composite and IrO2-Ta2O5 coatings. The electrochemical performance of Ti/IrO2-Ta2O5, Al/Ti/IrO2-Ta2O5 and Cu/Ti/IrO2-Ta2O5 composite anodes was studied by linear sweep voltammetry (LSV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results indicate that the electrochemical performance of Al/Ti/IrO2-Ta2O5 and Cu/Ti/IrO2-Ta2O5 anodes, compared to the Ti/IrO2-Ta2O5 anode, was effectively improved. Layered composite structure can significantly reduce the resistance and improve the conductivity of the substrate, and the reduction of resistance in electron transfer from electrode to reactants was observed. Because of the resistivity of Cu was the smallest, the resistivity of Cu/Ti layered composite was the lowest (5.1 × 10−8 Ω m), the anodic polarization performance and the electro-catalytic activity of Cu/Ti/IrO2-Ta2O5 anode were the best. The surface electric potential of the Al/Ti/IrO2-Ta2O5 and Cu/Ti/IrO2-Ta2O5 anodes were lower than that of Ti/IrO2-Ta2O5 anode, and the distribution of electric potential on the surface of layered composite anodes was more uniform than that of Ti/IrO2-Ta2O5 anodes.
AB - In this paper, the Al/Ti and Cu/Ti layered composite was prepared by the hot-pressing-bonding technique as the basic material of the anodes, and the IrO2-Ta2O5 coatings were thermally deposited on the different kinds of the matrix. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS) were used to study the Al/Ti and Cu/Ti layered composite and IrO2-Ta2O5 coatings. The electrochemical performance of Ti/IrO2-Ta2O5, Al/Ti/IrO2-Ta2O5 and Cu/Ti/IrO2-Ta2O5 composite anodes was studied by linear sweep voltammetry (LSV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results indicate that the electrochemical performance of Al/Ti/IrO2-Ta2O5 and Cu/Ti/IrO2-Ta2O5 anodes, compared to the Ti/IrO2-Ta2O5 anode, was effectively improved. Layered composite structure can significantly reduce the resistance and improve the conductivity of the substrate, and the reduction of resistance in electron transfer from electrode to reactants was observed. Because of the resistivity of Cu was the smallest, the resistivity of Cu/Ti layered composite was the lowest (5.1 × 10−8 Ω m), the anodic polarization performance and the electro-catalytic activity of Cu/Ti/IrO2-Ta2O5 anode were the best. The surface electric potential of the Al/Ti/IrO2-Ta2O5 and Cu/Ti/IrO2-Ta2O5 anodes were lower than that of Ti/IrO2-Ta2O5 anode, and the distribution of electric potential on the surface of layered composite anodes was more uniform than that of Ti/IrO2-Ta2O5 anodes.
KW - Al/Ti composite
KW - Cu/Ti composite
KW - Electrical properties
KW - IrO-TaO coated anodes
KW - Layered structures
UR - https://www.scopus.com/pages/publications/85050915404
U2 - 10.1016/j.jallcom.2018.07.330
DO - 10.1016/j.jallcom.2018.07.330
M3 - Article
AN - SCOPUS:85050915404
SN - 0925-8388
VL - 769
SP - 210
EP - 217
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -