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With good chemical stability and more active sites, the Ti/PbO2 electrode is a commonly used electrode material in the electrochemical oxidation reaction. However, drawbacks of large surface cracks and corrosion during redox processes still exist in conventional Ti/PbO2 electrodes. Herein, a PbO2 electrode modified with reduced graphene oxide and surfactant OP-10 (OP-10&rGO-PbO2) was prepared by electrodeposition with Ti/SnO2-Sb2O3 as a substrate. The addition of rGO was helpful in forming a dense surface of PbO2 and avoiding the side reaction of oxygen evolution during wastewater degradation. It has higher oxygen evolution potential and a longer service lifetime. In addition, the acrylamide (AA) degradation conditions were optimized. It was proved that the OP-10&rGO-PbO2 electrode has a good industrial application prospect in dye wastewater. The chemical oxygen demand removal rate of dye wastewater can reach 89% within 120 min. Furthermore, the degradation mechanism of AA was also discussed by gas chromatography–mass spectrometry technique, and the possible degradation path was also proposed.

The low electrical conductivity of nickel-cobalt layered oxides and single Ni, Co metal oxides led to the low rate capability and poor cycling stability thus limits the commercial application in practical supercapacitor. Here, NiCoO2/WCC composite electrode materials were prepared by employing wood chips carbon (WCC) with the high specific surface area and low cost as the conductive layer, where hierarchical spherical structure of laminar NiCoO2 interspersed as homogeneous and was oriented and constructed on the surface of carbon by hydrothermal and calcination. The strategy provided abundant frameworks and active sites for the in-situ growth of NiCoO2, which prevented the aggregation of spherical structures to a certain extent, further the layered spherical structure exposed more active sites, thus enhanced the electrochemical performance of the capacitor. The NiCoO2/WCC electrode (RNi:Co=1) possessed a high specific capacitance of 1053.6 F g− 1 at 0.5 A g− 1 due to the synergistic effect between the bimetallic oxide and WCC, and the specific capacitance of the electrode remained 906 F g− 1 even at a high current density of 10 A g− 1 by the lamellar structure with more electrochemical sites. In addition, the asymmetric supercapacitor based on the NiCoO2/WCC cathode and the WCC anode delivers a high specific capacitance of 134.4 F g− 1 at 1 A g− 1, a high specific energy of 36.6 Wh kg− 1 at 1 A g− 1, and good cycling performance (~ 94.3% retention after 5000 cycles), where the above properties was superior to existing and similar electrode materials.