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Design of On-Line Monitoring System for UHVDC Earth Electrode
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作者 Pinghao Ni Wei Wang Peng Wei 《Journal of Power and Energy Engineering》 2016年第2期13-18,共6页
At present the detecting of ultra high voltage direct current (UHVDC) earth electrode frequently uses manual inspection. This method can't get the real-time operational data of the earth electrodes, and meanwhile,... At present the detecting of ultra high voltage direct current (UHVDC) earth electrode frequently uses manual inspection. This method can't get the real-time operational data of the earth electrodes, and meanwhile, the labor cost is very high. In order to satisfy the security needs of UHVDC, this paper designs an on-line monitoring system for UHVDC earth electrode. By 3G wireless communication-technologies, the system can monitor remotely many kinds of data such as the value of the grounding current, water level of the observation well, soil temperature and humidity near the earth electrode, the micro-climate around the earth electrode site, video data, etc. Through analyzing the datum, the system has broad prospect on fault detection and life evaluation of the UHVDC earth electrode. 展开更多
关键词 UHVDC earth electrode On-Line Monitoring 3G
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Electro-catalytic degradation properties of Ti/SnO_2–Sb electrodes doped with different rare earths 被引量:3
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作者 Fu-Liang Zhu Yan-Shuang Meng Xiu-Yang Huang 《Rare Metals》 SCIE EI CAS CSCD 2016年第5期412-418,共7页
Ti/SnO2–Sb electrode has a good effect on the removal of organic pollutants. But its short service life limits its large-scale application in industry. Electro-catalytic degradation performances and service life of t... Ti/SnO2–Sb electrode has a good effect on the removal of organic pollutants. But its short service life limits its large-scale application in industry. Electro-catalytic degradation performances and service life of the electrode can be significantly improved by doping rare earth(RE) ions into the oxide coating of Ti/SnO2–Sb electrode. Ti/SnO2–Sb electrodes doped with different RE elements(Ce, Dy, La, and Eu) were prepared by the thermal decomposition method at 550 ℃. Electro-catalytic degradation performances of electrodes doped with different RE elements were evaluated by linear sweep voltammetry(LSV) and Tafel curves. During the electrolysis,the conversion of p-nitrophenol was performed with these electrodes as anodes under galvanostatic control. The structures and morphologies of the surface coating of the electrodes were characterized by scanning electron microscope(SEM). The results demonstrate that the electro-catalytic degradation performances of Ti/SnO2–Sb electrodes are improved to different levels by doping different RE ions. Improved Ti/SnO2–Sb electrodes by the introduction of different RE have higher oxygen evolution potential, better electro-catalysis ability, better coverage,and longer electrode life. 展开更多
关键词 Ti/SnO_2–Sb electrode Rare earth doped Thermal decomposition method Catalytic degradation
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Preparation of Ce-TiO_2/carbon aerogel electrode and its performance in degradation of 4-chlorophenol 被引量:4
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作者 Yabo Wang Zihong Pan +2 位作者 Dezhi Qin Suzhen Bai Qinlong Peng 《Journal of Rare Earths》 SCIE EI CAS CSCD 2018年第4期374-378,共5页
Ce-TiO2/CA(carbon aerogel) electrode was prepared by sol impregnation approach. The XRD(X-ray diffraction) and Raman spectra reveal that the TiO2 is anatase. The UV-vis diffuse reflectance spectra show that the op... Ce-TiO2/CA(carbon aerogel) electrode was prepared by sol impregnation approach. The XRD(X-ray diffraction) and Raman spectra reveal that the TiO2 is anatase. The UV-vis diffuse reflectance spectra show that the optical absorption edge for Ce-TiO_2/CA is red-shifted to 535 nm compared with TiO_2/CA. Under visible light irradiation, the photocurrent density increment on Ce-TiO_2/CA is 75 times that on Ce-TiO_2/FTO(fluorine-doped tin oxide). The electrochemical impedance spectroscopy reveals that the conductivity of CeTiO_2/CA is much better than the Ce-TiO_2/FTO. Furthermore, the Ce-TiO_2/CA can be used to the highest electrosorptive photodegradation for 4-chlorophenol wastewater degradation, which is ascribed predominantly to the efficient reduction of electron-hole pair recombination in the photocatalysts. 展开更多
关键词 Ce-TiO2/carbon aerogel electrode Electrosorption Visible light photocatalysis 4-chlorophenol Rare earths
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Cathodic reduction process of Al-Cu-Y alloy in fluoride-oxide eutectic system via molten salt electrolysis 被引量:6
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作者 Xu Wang Chunfa Liao +1 位作者 Yunfen Jiao Hao Tang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2018年第3期324-330,共7页
Al-Cu-Y alloys were prepared by molten salt electrolysis in fluoride-oxide system composed of electrolyte(Na3 AlF6-AlF3-LiF-MgF2) and oxide(Al2 O3-CuO-Y2 O3). Cathodic reduction process of Al2 O3,CuO and Y2 O3 wer... Al-Cu-Y alloys were prepared by molten salt electrolysis in fluoride-oxide system composed of electrolyte(Na3 AlF6-AlF3-LiF-MgF2) and oxide(Al2 O3-CuO-Y2 O3). Cathodic reduction process of Al2 O3,CuO and Y2 O3 were analyzed by cyclic voltammetry and chronoamperometry. Components and phase composition of alloy samples prepared by potentiostatic electrolysis were characterized by scanning electron microscopy and energy dispersive spectroscopy. The results show that the Al-Cu-Y alloy can be prepared in the AIF3-NaF-5 wt%LiF-5 wt%MgF2(NaF/AlF3 = 2.2, molecular ratio) eutectic system with mixed oxide(Al2 O3-CuO-Y2 O3) through 2 h at the conditions of a temperature of 1208 K, cell voltage3.0 V, cathode current density 0.7 A/cm^2. Al(Ⅲ) and Cu(Ⅱ) ions can be reduced to zero valence Al(0) and Cu(0) directly on carbonaceous electrode surface by instantaneous nucleation, respectively, the reduction process is controlled by diffusion. The reduction potential of Y(Ⅲ) ions is close to the active ions of fluoride melts, but strengthened phase AI3 Y can be formed through electrochemical reduction and alloyed process with active Al(Ⅲ) and Cu(Ⅱ) ions, meanwhile, the Al2 Cu and Al3 Y phases are distributed at the grain boundary of Al matrix. 展开更多
关键词 Fluoride-oxide eutectic Al-Cu-Y alloy Molten salt electrolysis Cyclic voltammetry electrode process Rare earths
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