The electrochemical reduction of CO2 to capacitive carbon in molten Li2 CO3–Na2 CO3–K2 CO3 is an effective strategy for capturing and utilizing CO2. This paper reports the effects of the cell voltages and operating ...The electrochemical reduction of CO2 to capacitive carbon in molten Li2 CO3–Na2 CO3–K2 CO3 is an effective strategy for capturing and utilizing CO2. This paper reports the effects of the cell voltages and operating temperatures(450–650 °C) of the molten salt electrolysis on the capacitive performance of electrolytic carbon. The electrolytic carbon delivers excellent specific capacitance when the cell voltage is 4.5 V and the temperature of molten salt is 450 °C. The carbon obtained at 450 °C and under 4.5 V delivers a specific capacitance of 550 F g^(-1) at 0.2 A g^(-1) in 1 M aqueous H2 SO4, and the capacity retention rate is73% after 10000 cycles. The specific capacitance of the electrolytic carbon increases as the electrolysis temperature decreases, and the optimal cell voltage is 4.5 V.展开更多
This study is a new method for recovery and utilization of waste gas sludge from iron and steel industry.Because the gas sludge contains iron and carbon elements,the gas sludge is prepared into an Electro-Fenton(E-Fen...This study is a new method for recovery and utilization of waste gas sludge from iron and steel industry.Because the gas sludge contains iron and carbon elements,the gas sludge is prepared into an Electro-Fenton(E-Fenton)cathode in this study.In this paper,the gas sludge was treated at high temperature to prepare the electrode.X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)were used to characterize the gas sludge to determine the valence state of iron.The linear voltammetry curve was swept for the gas sludge electrode.The degradation effect of azo dye X3B was more than 90%in 25 min.The dissolution of total Fe and Fe^2+,the formation of hydrogen peroxide(H2O2)andiron hydroxyl radicals($OH)were also detected.The results show that there is an E-Fenton reaction in the process of gas sludge cathodic degradation of X3B.展开更多
基金financially supported by the National Natural Science Foundation of China (21673162)the International Science & Technology Cooperation Program of China (2015DFA90750)。
文摘The electrochemical reduction of CO2 to capacitive carbon in molten Li2 CO3–Na2 CO3–K2 CO3 is an effective strategy for capturing and utilizing CO2. This paper reports the effects of the cell voltages and operating temperatures(450–650 °C) of the molten salt electrolysis on the capacitive performance of electrolytic carbon. The electrolytic carbon delivers excellent specific capacitance when the cell voltage is 4.5 V and the temperature of molten salt is 450 °C. The carbon obtained at 450 °C and under 4.5 V delivers a specific capacitance of 550 F g^(-1) at 0.2 A g^(-1) in 1 M aqueous H2 SO4, and the capacity retention rate is73% after 10000 cycles. The specific capacitance of the electrolytic carbon increases as the electrolysis temperature decreases, and the optimal cell voltage is 4.5 V.
基金This work was financially supported by the National Natural Science Foundation of China(21477165),Technology Project of Wuhan(2017060201010190)Innovative Team Project of SCUN(CZT18020).
文摘This study is a new method for recovery and utilization of waste gas sludge from iron and steel industry.Because the gas sludge contains iron and carbon elements,the gas sludge is prepared into an Electro-Fenton(E-Fenton)cathode in this study.In this paper,the gas sludge was treated at high temperature to prepare the electrode.X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)were used to characterize the gas sludge to determine the valence state of iron.The linear voltammetry curve was swept for the gas sludge electrode.The degradation effect of azo dye X3B was more than 90%in 25 min.The dissolution of total Fe and Fe^2+,the formation of hydrogen peroxide(H2O2)andiron hydroxyl radicals($OH)were also detected.The results show that there is an E-Fenton reaction in the process of gas sludge cathodic degradation of X3B.
