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Dan Y.,Jilin University | Lu H.,Jilin University | Lu H.,Suzhou Nistar Chemical Technology Co. | Liu X.,Jilin University | And 2 more authors.
International Journal of Hydrogen Energy | Year: 2011

Ti/PbO2 + nano-Co3O4 composite electrode materials with different compositions were prepared by anodic composite electrodeposition on Ti substrate, with a SnO2-Sb2O 5 intermediate layer in Pb2+ plating solution containing suspended nano-Co3O4 particles. The composition, structure, and morphology of the composite materials were investigated by XRD, XPS, and SEM analyses. The composite electrodes were studied as anodes for oxygen evolution reaction (OER) in 1 mol/L NaOH solution. The activities for the OER of the composites were explained by recording linear scanning voltammograms and Tafel plots. Results indicate that the onset potential of oxygen evolution at the composite electrode was lowered by approximately 160 mV compared to the PbO2 electrode without nano-Co3O4. The catalytic activity of the composite electrode towards OER was improved significantly. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.


Wang X.,Jilin University | Huang W.-M.,Jilin University | Huang W.-M.,Suzhou Nistar Chemical Technology Co. | Li H.-T.,Jilin University | And 5 more authors.
Chemical Research in Chinese Universities | Year: 2010

The paper deals with the influence of anode material on the efficiency of degradation for organic pollutants in water system. The electrochemical performance of fluorine ion doped lead dioxide(F--PbO2) electrode for the degradation of aniline was compared with that of undoped lead dioxide(PbO2) electrode by ultravioletvisible(UV-Vis) spectroscopy, linear voltammetry and other analytical methods, such as the measurement by chemical oxygen demand analyzer, high performance liquid chromatography and scanning electron micrography. It was shown that both PbO2 electrode and F--PbO2 electrode could make aniline be mineralized completely and have the same degradation course, but F--PbO2 electrode has much higher electrocatalytic activity than undoped PbO2 electrode for the electrochemical degradation of aniline. The experimental results confirm that F--PbO2 electrode has much higher potential for oxygen evolution than undoped PbO2 electrode.


Dan Y.-Y.,Jilin University | Lu H.-Y.,Jilin University | Lu H.-Y.,Suzhou Nistar Chemical Technology Co. | Liu X.-L.,Jilin University | And 3 more authors.
Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities | Year: 2011

Ti/SnO2-Sb2O5/PbO2 + nano-Co3O4 composite electrode material was prepared by the anode composite electrodeposition method on Ti substrate with the intermediate SnO2-Sb2O5 layer. The influences of preparation conditions on the composition, structure and morphology of the composite material were investigated by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and scanning electron microscope(SEM) analyses. The results show that porosity and roughness of the PbO2 surface are increased because of the embedded Co3O4; the Co3O4 embedding content is effected by the deposition potential, nano particles concentration and the addition of organic reagent.


Wang X.,Jilin University | Huang W.-M.,Jilin University | Huang W.-M.,Suzhou Nistar Chemical Technology Co. | Liu X.-B.,Jilin University | And 3 more authors.
Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities | Year: 2011

Influence of chloride ion as the electrolyte on electrochemical oxidation of phenol with both Ti/SnO2-Sb2O5/PbO2 and Ti/Ru-Ti-Sn oxide coating anode was investigated. The results showed that the addition of chloride ions in the electrolyte caused increasing in removal efficiency and the complete degradation of phenols pollutants. The main way of electrochemical degradation of phenol without chloride ion was direct electrochemical oxidation. It could contain both direct and indirect electrochemical oxidation during the degradation of phenol with chloride ion. It would mainly start with phenol indirect electrochemical oxidation on anode that could generate chlorine(such as Ti/Ru-Ti-Sn anode). For high oxygen evolution anode system, such as Ti/PbO2 anode, direct and indirect electrochemical oxidation of organic matter may occur at the same time. Effects of chloride ion on indirect electrochemical oxidation of organic matter is similar to the actions of medium body. The medium is mainly due to the generation of oxidation and reduction of the media of chloride ion and active chlorine in the surface layer and bulk solution during the process of organic oxidation.

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