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Research on micro-structure and catalysis properties of nanosized Ce_(1–x)(Fe_(0.5)Eu_(0.5))_xO_(2–δ) solid solutions

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Journal of Rare Earths 2017年第1期35卷 63-70页

作者： ZHANG Guofang XU Jianyi HOU Zhonghui WANG Qingchun School of Material and Metallurgy Inner Mongolia University of Science and Technology Baotou 014010 China Key Laboratory of lntergrate Exploration of Baiyun Obo Multi-metal Resources Inner Mongolia University of Science and Technology Baotou 014010 China

Nanosized Fe^3＋ and Eu^3＋ codoped CeO2 solid solutions were synthesized via hydrothermal method. The crystalline structure of Ce1-x（Fe0.5Eu0.5）xO2-δx=0.00–0.30） solid solutions was carried out by the X-ray diffraction technique, and the spectrum features were identified by UV-Vis and Raman spectroscopy, respectively. It was observed that the cell parameters were first increased then decreased by increasing the doped ions content. The phase separation was detected when the dopant concentration reached to x=0.30. UV-Vis spectrum showed that the width of the band gap gradually reduced by increasing the doped content, and the solid solubility was determined to be x=0.20. The Raman technique displayed that the peak position of F2g mode gradually shifted to lower frequencies from 465 cm^–1 for x=0.00 to 440 cm^–1 for x=0.20. The catalytic effects of Ce1-x（Fe0.5Eu0.5）xO2-δsolid solutions on the electrochemistry properties of Mg2Ni/Ni were measured by mixing them together via ball milling technique. The electrochemical properties of the Mg_2Ni/Ni-Ce1-x（Fe0.5Eu0.5）xO2-δcomposites showed that the maximum discharge capability Cmax and the cycle stability were improved obviously. Meanwhile, the EIS characteristic also indicated that the doped solid solutions could enhance the rate of charge transfer on the surface of alloy. The catalytic effect of the solid solutions was speculated to rely on both the concentration of oxygen vacancies and the cell volumes of the solid solutions.

关键词： solid solution hydrothermal Mg2Ni catalysis effect electrochemistry property rare earths

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Effect of tin addition on microstructure and electrochemical properties of rolled AZ61-Sn magnesium anodic materials

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Rare Metals 2011年第6期30卷 639-643页

作者： WANG Ping LI Jianping GUOYongchun YANG Zhong XIA Feng WANG Jianli School of Materials and Chemical Engineering Xi＇ an Technological University Xi＇ an 710032 China

Microstructure characterization, corrosion behavior, and electrochemical properties of magnesium anode materials containing 1-3 wt.% Sn in AZ61 alloy were studied by optical microscopy, X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and energy-dispersive spec- troscopy （EDS）, constant current method, potential polarization, and drainage. The results showed that amount of Mg2Sn phase increased, and recrystallization ratio of Sn-contained Mg alloys during rolling process was improved with increasing of Sn content. This resulted in uniform and refined gains. The results also demonstrated that discharge potential was improved and hydrogen release rate was reduced with the addition of Sn. As the current density increased, the release hydrogen rate was rising, owing to negative variance effect of magnesium alloys. The current efficiency gets to 87% at 20 mA/cm2. The main components of the corrosion products are easy-to-peel-off MgO and Al2O3 that can lead to more negative and stable work potential and accelerate battery reaction continuously.

关键词： magnesium alloys anode material rolling seawater battery electrochemistry property

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Effects of Co^(2+)Doping on the Crystal Structure and Electrochemical Performance of LiFePO_4

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Chinese Journal of Structural Chemistry 2011年第10期30卷 1477-1482页

作者：任强杨旸 Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry Ministry of EducationShaanxi University of Science and Technology

Co2＋-doped LiFePO4/C composite material was prepared by solid-state synthesis method using Fe2O3,Li2CO3 and NH4H2PO4 as the starting *** structures and elec-trochemical performance of samples were studied by XRD,SEM and constant current charge-discharge *** results showed that the Co2＋ doping did not change the crystal structure of *** unit cell volume changed with the increase of Co2＋,and reached the maximum at x = *** LiFe0.96Co0.04PO4/C sample proved the best electrochemical *** initial discharge capacity was 138.5 mA·h /g at 1 C *** 30 cycles,the capacity remained 127.7 mA·h /g,and the capacity retention rate was 92.2%.

关键词： LiFePO4/C cathod material Co2+-doping unit cell volume electrochemistry property

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Hydrothermal Synthesis,Crystal Structure and Electrochemical Properties of a New Dinuclear Copper Complex [C_2H_6ON]_2[Cu_2Cl_2(μ-CH_3COO)_4]

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Chinese Journal of Structural Chemistry 2009年第6期28卷 703-707页

作者：许瑞波许兴友王明艳杨绪杰汪信陆路德马卫兴 Materials Chemistry Laboratory Nanjing University of Science & Technology Department of Chemical Engineering Huaihai Institute of Technology

The hydrothermal reaction of copper chloride dihydrate and 5,5-dimethyl-imidazolidine,-2,4-dione with a mole ratio of 1：1 in acetonitrile resulted in the formation of a new acetate-bridged dinuclear copper complex, [C2H6ON]2[Cu2Cl2（μ-CH3COO）4]. Protonated acetamide in eaolie form and acetic acid were yielded by the hydrolysis of acetonitrile under hydrothennal condition. The rifle complex （C12H24Cl2Cu2N2O10） was characterized by X-ray single-crystal diffraction, IR spectrum, elemental and electrochemical analysis. It crystallizes in the monoclinic system, space group P21/c with a = 8.298004）, b = 14.358（2）, c = 12.0010（2） A^°, β= 130.620（3）°, V = 1085.3（2） A^°^3, Dc = 1.696 g/cm^3, 34, = 554.31, Z = 2, F（000） = 564 and μ = 2.254 mm^-1. The crystal structure consists of a tetraacetate-bridging dinulcear copper complex anion [Cu2Cl2（μ-CH3COO）4]^2-, with the chlorine anions in the axial positions, and two protonated acetamide cations [C2H6ON]^＋, which were connected through hydrogen bonds to form a three-dimensional infinite network.

关键词： dinuclear copper hydrothermal synthesis crystal structure electrochemistry property

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