Samaria-doped ceria Ce0.8Sm0.2O2-δ(SDC) and SmFe0.7Cu0.3-xNixO3 have been synthesized by the sol-gel method and characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM) and scanning electron micr...Samaria-doped ceria Ce0.8Sm0.2O2-δ(SDC) and SmFe0.7Cu0.3-xNixO3 have been synthesized by the sol-gel method and characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM) and scanning electron microscopy(SEM).The electrochemical synthesis of ammonia was investigated at atmospheric pressure and low temperature,using the SFCN materials as the cathode,a Nafion membrane as the electrolyte,nickel-doped SDC(Ni-SDC) as the anode and silver-platinum paste as the current collector.Ammonia was synthesized from 25 to 100℃ when the SFCN materials were used as cathode,with SmFe0.7Cu0.1Ni0.2O3 giving the highest rates of ammonia formation.The maximum rate of evolution of ammonia was 1.13 × 10-8 mol·cm-2·s-1 at 80℃,and the current efficiency reached as high as 90.4%.展开更多
The characteristics of the CO gas sensor with partly Nafion solid electrolyte havebeen studied with the method of electrolysis at a fixed potential. It is found that the sensorhas the advantages of rapid response, low...The characteristics of the CO gas sensor with partly Nafion solid electrolyte havebeen studied with the method of electrolysis at a fixed potential. It is found that the sensorhas the advantages of rapid response, low background current and noise etc. in comparisonwith that of the sensor using aqueous electrolyte. Hence, it may also be used for the measurement of low concentration CO gas.展开更多
基金Supported by the National Natural Science Foundation of China (Grant No. 20863007)
文摘Samaria-doped ceria Ce0.8Sm0.2O2-δ(SDC) and SmFe0.7Cu0.3-xNixO3 have been synthesized by the sol-gel method and characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM) and scanning electron microscopy(SEM).The electrochemical synthesis of ammonia was investigated at atmospheric pressure and low temperature,using the SFCN materials as the cathode,a Nafion membrane as the electrolyte,nickel-doped SDC(Ni-SDC) as the anode and silver-platinum paste as the current collector.Ammonia was synthesized from 25 to 100℃ when the SFCN materials were used as cathode,with SmFe0.7Cu0.1Ni0.2O3 giving the highest rates of ammonia formation.The maximum rate of evolution of ammonia was 1.13 × 10-8 mol·cm-2·s-1 at 80℃,and the current efficiency reached as high as 90.4%.
文摘The characteristics of the CO gas sensor with partly Nafion solid electrolyte havebeen studied with the method of electrolysis at a fixed potential. It is found that the sensorhas the advantages of rapid response, low background current and noise etc. in comparisonwith that of the sensor using aqueous electrolyte. Hence, it may also be used for the measurement of low concentration CO gas.
