TY - JOUR
T1 - Fabrication of nano-structured stacked sphere SnO2-Sb electrode with enhanced performance using a situ solvothermal synthesis method
AU - Yang, Lisha
AU - Liu, Junfeng
AU - Huang, Linlin
AU - Zhang, Zhaohan
AU - Yu, Yanling
AU - Liu, Jia
AU - Logan, Bruce E.
AU - Feng, Yujie
N1 - Funding Information:
This work was supported by the National Key R&D Program of China (Grant No. 2016YFE0106500) and the Key Science & Technology Program of Heilongjiang Province (WB10A401). The authors also acknowledge the support of the State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) (No. 2018DX01).
Publisher Copyright:
© 2018 The Electrochemical Society.
PY - 2018
Y1 - 2018
N2 - A titanium-base nano-coating Sb-doped SnO2 electrode with a nano-scaled sphere-stacking structure was successfully fabricated using a solvothermal synthesis approach to enhance electrochemical performance through the formation of a nano-sized catalyst layer. Based on scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis, the nano-coated SnO2-Sb electrode had very small (23 nm) catalyst grains that had a stacked sphere appearance, and thus a much greater specific surface area than the control electrode (SnO2-Sb prepared by a dip-coating method, 106 nm grain size). X-ray photoelectron spectroscopy (XPS) analysis showed that the nano-coated electrode possessed a higher concentration of oxygen vacancies, which provided many more active centers for the formation of adsorbed Oxygen (Oads), which increased the production of •OH radicals and therefore the catalytic activity of organic pollutant degradation. Linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) showed that the electrode with a nano-structure coating had a higher oxygen evolution potential (2.1 V, vs. Ag/AgCl) and smaller charge transfer resistance (49 ) than the control (1.95 V and 93 ). A kinetic analysis of the electrochemical degradation of phenol showed that the first-order kinetic rate constant for the nano-coated electrode was 1.72 times higher than the control. Accelerated service life testing showed that the stability of this novel fabricated electrode was 15 h, which was nearly 11 times longer than that of non-nano SnO2-Sb electrode.
AB - A titanium-base nano-coating Sb-doped SnO2 electrode with a nano-scaled sphere-stacking structure was successfully fabricated using a solvothermal synthesis approach to enhance electrochemical performance through the formation of a nano-sized catalyst layer. Based on scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis, the nano-coated SnO2-Sb electrode had very small (23 nm) catalyst grains that had a stacked sphere appearance, and thus a much greater specific surface area than the control electrode (SnO2-Sb prepared by a dip-coating method, 106 nm grain size). X-ray photoelectron spectroscopy (XPS) analysis showed that the nano-coated electrode possessed a higher concentration of oxygen vacancies, which provided many more active centers for the formation of adsorbed Oxygen (Oads), which increased the production of •OH radicals and therefore the catalytic activity of organic pollutant degradation. Linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) showed that the electrode with a nano-structure coating had a higher oxygen evolution potential (2.1 V, vs. Ag/AgCl) and smaller charge transfer resistance (49 ) than the control (1.95 V and 93 ). A kinetic analysis of the electrochemical degradation of phenol showed that the first-order kinetic rate constant for the nano-coated electrode was 1.72 times higher than the control. Accelerated service life testing showed that the stability of this novel fabricated electrode was 15 h, which was nearly 11 times longer than that of non-nano SnO2-Sb electrode.
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U2 - 10.1149/2.0711805jes
DO - 10.1149/2.0711805jes
M3 - Article
AN - SCOPUS:85046645661
SN - 0013-4651
VL - 165
SP - E208-E213
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 5
ER -