Influence of Fluoride-doped Tin Oxide Interlayer on Ni-Sb-SnO2/Ti Electrodes

LI Guo; WANG Yun-Hai; CHEN Qing-Yun

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Influence of Fluoride-doped Tin Oxide Interlayer on Ni-Sb-SnO2/Ti Electrodes

LI Guo 1,WANG Yun-Hai 1 * #,CHEN Qing-Yun 2

1.Department of Environmental Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049

2.State Key Lab of Multiphase Flow and Power Engineering, Xi'an Jiaotong University, Xi'an 710049

*Correspondence author

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Funding: Research Fund for the Doctoral Program of Higher Education of China （No.No.20090201120010）, Natural Science Foundation of China （No.No.21206134)）

Opened online:18 December 2012

Accepted by: none

Citation: LI Guo,WANG Yun-Hai,CHEN Qing-Yun.Influence of Fluoride-doped Tin Oxide Interlayer on Ni-Sb-SnO2/Ti Electrodes[OL]. [18 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4500527

In the present work, fluoride doped tin oxide (FTO) as an interlayer was introduced into nickel and antimony co-doped tin dioxide (NATO) coated titanium electrodes to investigate the influence of FTO interlayer on the structural properties and lifetime performance of the electrodes. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used to characterize the morphology and crystal structure of the electrodes with or without FTO interlayer. The electrode surface became smoother with FTO interlayer introduced while the crystallite size reduced. Electrochemical impedance spectroscopy (EIS) was also adopted to analyze the electrodes' electrochemical behavior. With FTO interlayer introduced, the formation of titanium dioxide insulating layer on the titanium substrate was significantly retarded during the anodic process. The accelerated lifetime tests presented that the lifetime of the electrodes with proper FTO interlayer was 6 times longer than that without FTO interlayer. The mechanisms for the electrodes' lifetime enhancement with FTO interlayer were discussed.

Keywords:Environmental engineering; fluoride doped tin oxide; nickel and antimony doped tin oxide; lifetime; crystal structure; morphology

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