A λ-MnO2 supported Pt nanocatalyst（5 wt.% Pt/λ-MnO2） was synthesized using a facile approach.X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS）, scanning electronic microscope（SEM）, transmission e...A λ-MnO2 supported Pt nanocatalyst（5 wt.% Pt/λ-MnO2） was synthesized using a facile approach.X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS）, scanning electronic microscope（SEM）, transmission electron microscopy（TEM）, and energy disperse spectroscopy（EDS） were used for catalyst structure and morphology characterization, which showed that the metallic Pt particles were attached on a λ-MnO2 surface through the interaction between Pt and λ-MnO2.Cyclic voltammetry（CV） was used to test the catalytic activity of Pt/λ-MnO2 toward methanol oxidation, which showed that Pt/λ-MnO2 catalyst has much higher catalytic activity than baseline Pt/C catalyst.展开更多
Effect of ethanolamine （ETA） on Alloy 690 in simulated pressurized water reactor （PWR） secondary cooling water was studied by electrochemical impedance spectroscopy （EIS）, potentiodynamic polarization, atomic fo...Effect of ethanolamine （ETA） on Alloy 690 in simulated pressurized water reactor （PWR） secondary cooling water was studied by electrochemical impedance spectroscopy （EIS）, potentiodynamic polarization, atomic force microscopy （AFM）, Fourier transform infrared spectroscopy-attenuated total reflectance （FTIR-ATR）, X-ray photoelectron spectrometer （XPS） and time of flight secondary ion mass spectrometry （ToF-SIMS）. The results show that moderate addition of ETA can enhance the corrosion resistance of Alloy 690 in high-temperature pressurized water and the optimum additive value is 2 mg/L. The addition of ETA contributes to the formation of oxide rather than hydroxide in the film on the surface of Alloy 690. The corrosion resistance of Alloy 690 at 320 ℃ with the addition of ETA is better than that at 280 ℃.展开更多
基金supported by the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality, Beijing Natural Science Foundation (No. 207001)the Major State Basic Research and Development Program of China (No. 2002CB211807)
文摘A λ-MnO2 supported Pt nanocatalyst（5 wt.% Pt/λ-MnO2） was synthesized using a facile approach.X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS）, scanning electronic microscope（SEM）, transmission electron microscopy（TEM）, and energy disperse spectroscopy（EDS） were used for catalyst structure and morphology characterization, which showed that the metallic Pt particles were attached on a λ-MnO2 surface through the interaction between Pt and λ-MnO2.Cyclic voltammetry（CV） was used to test the catalytic activity of Pt/λ-MnO2 toward methanol oxidation, which showed that Pt/λ-MnO2 catalyst has much higher catalytic activity than baseline Pt/C catalyst.
基金supported by the National Key Science and Technology Project of China (No. 2011ZX06004-017)the National Natural Science Foundation of China (No. 51025104)
文摘Effect of ethanolamine （ETA） on Alloy 690 in simulated pressurized water reactor （PWR） secondary cooling water was studied by electrochemical impedance spectroscopy （EIS）, potentiodynamic polarization, atomic force microscopy （AFM）, Fourier transform infrared spectroscopy-attenuated total reflectance （FTIR-ATR）, X-ray photoelectron spectrometer （XPS） and time of flight secondary ion mass spectrometry （ToF-SIMS）. The results show that moderate addition of ETA can enhance the corrosion resistance of Alloy 690 in high-temperature pressurized water and the optimum additive value is 2 mg/L. The addition of ETA contributes to the formation of oxide rather than hydroxide in the film on the surface of Alloy 690. The corrosion resistance of Alloy 690 at 320 ℃ with the addition of ETA is better than that at 280 ℃.
